SEO vs. PPC advertising: what’s the difference and when to choose which

What PPC advertising is and what SEO is

PPC advertising: ads triggered by queries

The advertiser sets keywords, and the ad can appear when a user’s query matches them. Examples of PPC advertising platforms are Yandex Direct and Google Ads. This kind of advertising is sometimes called contextual advertising or search advertising.

Ads aren’t shown only in search. Google has search partners — other sites where ads can appear alongside search results. Yandex has the Yandex Advertising Network: ads are shown on Yandex’s own services and on partner sites and mobile apps. The rest of this article is only about search ads — also called search advertising.

Which advertisers make it onto the page, and in what position, is decided by the auction — an automatic selection of ads for every impression. A bid is the amount the advertiser is willing to pay for a click. Google’s Ad Rank factors in the bid, the quality of the ad and the landing page, the level of competition, and the context of the search. On Yandex, ads are ranked by cost-per-click bid, a quality coefficient and a click-through forecast. A high bid alone doesn’t guarantee first place: Google states outright that a relevant ad can outrank a competitor with a higher bid.

PPC isn’t the only kind of paid advertising online: there’s also display advertising and targeted advertising. We don’t cover those here.

SEO: organic results

Organic results (organic search) are the regular search results a search engine pulls from its index without payment. Google describes search engine optimization this way: it helps search engines better understand your content, and helps users find your site in the search results. A separate article covers what search engine optimization includes in more detail.

The main difference from advertising is who makes the decision. The search engine itself crawls pages, indexes them — that is, adds them to its database — and decides what to show for a query. Google doesn’t charge a fee to crawl a site more often or to raise its rankings.

How to tell ads apart from organic results

• Google. Ads appear above or below the search results and carry an “Ad” label so they can’t be mistaken for regular results.
• Yandex. Ads appear in separate blocks: premium placements above the search results, the rest in the middle or at the bottom of the page.

Search engines change the look of these labels and the placement of these blocks from time to time, so it’s more reliable to look at the live results for your own query. An organic result looks like an ordinary snippet: a page’s title, URL and description. There’s a separate breakdown of how a page’s snippet is formed in the regular results.

Is SEO a form of advertising

In a broad sense, SEO is a way to attract visitors from search, and in that respect it solves the same task as advertising. But it isn’t advertising in the sense of a paid placement: no one pays the search engine for a spot in the organic results.

Google states that it only sells space for ads, and that a high position in the search results can’t be bought. Yandex Advertising’s training materials say the same thing: in organic search, usefulness is assessed by algorithms, and buying a spot in the organic results is impossible.

This doesn’t mean SEO is free. Working on a site costs resources: the team’s time or a contractor’s fee. The difference is what you’re paying for. In advertising, you pay for the ad to be shown as a result of the auction. In SEO, you pay for changes to the site, while the decision to show it stays with the search engine.

How SEO differs from PPC advertising

	PPC advertising	SEO
What you pay for	For the result of an ad being shown: for example, a click; in Direct, also conversions	You pay the search engine nothing: Google doesn’t charge for rankings. The cost is the work on the site
Who decides where the link ends up	The auction: bid, ad and landing page quality, click-through forecast	The search engine’s algorithms; a spot can’t be bought
Which queries it shows for	Queries that match the chosen keywords	Queries the search engine considers the page a good match for
What you control	Keywords, ad copy, region, time of display, budget	The site’s content and technical condition. You don’t set the rankings; there’s no recipe for top positions
When the first traffic is possible	After ad review and campaign launch	After the search engine processes the pages; there’s no way to set a date in advance
What happens if you stop paying	The ads stop showing	There’s nothing to pay the search engine for in the first place, so there’s no one to switch the display off. Rankings are still determined by the algorithms and the competition
How it looks in the results	Separate ad placements; on Google, an “Ad” label	Regular search results

Payment model

In Google Ads, with cost-per-click billing, you pay every time a user clicks the ad. You set a maximum cost-per-click bid in advance — the largest amount you’re willing to pay. In Yandex Direct, besides paying for clicks, there’s payment for conversions — for every target action on the site. The auction determines the final click price: in Direct, the average price is calculated under the rules of the VCG auction.

In SEO, you don’t pay the search engine for clicks or for rankings. There are costs, but they’re tied to the work itself: analytics, copywriting, technical improvements to the site.

Speed of launching and stopping

An ad campaign launches once the ads pass review. In Google Ads, new and edited ads are automatically sent for review and start showing once approved. In Direct, an ad doesn’t show until it has fully passed moderation.

Stopping impressions is also fast. If a campaign in Google Ads is paused, the ads don’t show until you resume it. In Direct, impressions stop if the campaign is paused manually or the account runs out of funds.

SEO doesn’t work that way. Google warns that changes to a site aren’t processed right away, and it doesn’t guarantee that a page will be crawled, indexed and shown in the results. There’s no way to set a date by which a page will appear in search.

What you control and what you don’t

In advertising, you choose which queries to show for, where and when. In Google Ads, you can set the display regions, the hours and days of the week, and the campaign’s daily budget. Direct also has display regions and time-of-day targeting. But you don’t set the ad’s position — it depends on the auction and shifts along with the competition.

In SEO, you manage the site: its structure, content, technical foundation. The search engine decides the rankings. By Google’s own account, there’s no recipe that would automatically put a site in the top positions.

Strengths and limitations of each channel

Channel	Strengths	Limitations
PPC advertising	Impressions start once the ads pass review, with no wait for indexing. Precise choice of queries, region and display time. Convenient for testing demand for a new service or supporting a limited-time offer. Reports show which queries produced impressions	Traffic lasts only as long as the campaign is funded. The auction — meaning competitors too — determines the click price. Ads go through moderation. Campaigns need regular setup and monitoring
SEO	You don’t pay the search engine for clicks or rankings. Pages can bring in visitors without paying for every impression. You can cover informational queries that articles and reference sections answer. Improvements remain part of the site	There’s no way to set a results timeline in advance. Algorithms determine the rankings, with no guarantees. It needs ongoing work, not a one-time setup. Costs start before traffic appears

So promises of specific rankings and timelines in SEO deserve a skeptical read: rankings are determined by the search engine, not by whoever is doing the work. For example, in our description of what ongoing SEO support includes, we state outright that we don’t guarantee rankings or timelines.

When each channel fits: choosing by the signals in your task

Arguing about “which is better” is usually pointless: the channels solve different tasks. It’s more useful to check your situation against them.

Signal in the task	What’s usually the better fit	Why
Few search queries exist for the topic	Neither channel creates demand that doesn’t exist	Both channels need people who are already searching. First, it’s worth checking demand for the topic in search
Traffic is needed by a specific date: a sale, a seasonal offer, a launch	Advertising	Impressions can start and stop on the days you need; with SEO you can’t set a date for results
A new service, and it’s unclear whether people will buy it	Advertising, as a test	You can cap the budget and see which queries bring people in and what they do on the site
Steady demand that will still be there a year from now	SEO, combined with advertising if needed	Pages keep working without paying for every click
Lots of informational queries: “how,” “what is,” “how is X different from Y”	SEO	Articles and reference pages answer these kinds of questions
Commercial queries with heavy competition	Both channels	Advertising gets you a spot in the results now; SEO builds a base for the future. More detail on how commercial queries differ from informational ones
The site is slow, indexes poorly, has no suitable pages	Fix the site first	A paid click to an inconvenient page won’t turn into a lead, and SEO will run into the same problems. Here’s what to check on a site before sending traffic to it
The budget might suddenly stop	SEO as the foundation, advertising as a supplement	Advertising stops showing without payment

When advertising is the better fit

Advertising makes more sense when speed or a deadline matters. A sale with an end date, a seasonal product, an event — you can’t wait for the search engine to process new pages here. The same goes for testing a hypothesis: before building a section for a new service, you can use a small budget to see whether people search for it and leave inquiries.

When it makes more sense to start with SEO

It’s worth starting with SEO when demand is steady and you plan to work with it for a long time. Especially if there are a lot of informational queries: articles and reference pages answer those. SEO doesn’t depend on paying for every click, but it has no guaranteed timeline, so budget in time for the work before the first results.

When you need both channels

Often it’s not an either-or question. Advertising covers urgent needs while SEO builds up strength. Data from one channel helps the other — that’s the next section.

How to combine SEO and PPC advertising

Advertising data for SEO

Both platforms have a search terms report. In Google Ads, it shows the queries that triggered ad impressions and clicks. In Direct, the “Search queries” report helps analyze the queries ads were shown for.

This data is useful for SEO too. The report shows which words people actually use to describe your service and which phrasings lead to inquiries. You can use it to refine your keyword set and decide which queries need a page of their own.

Organic search for advertising

A page prepared for search can also serve as the landing page for ads. This matters for advertising: Google’s Ad Rank factors in the landing page’s quality. In its Quality Score, Google assesses how relevant and useful the landing page is for the people who’ll click the ad. A clear page that answers the query is something both channels need.

Queries the site is already visible for

If a page already ranks high in organic search for a query, it’s worth checking whether you also need advertising for it: you might be paying for some clicks from visitors who would have come anyway. This applies especially to branded queries — ones where people search for your company by name. It’s better to make this decision based on data from both channels, not by default.

Why comparing the channels head-to-head is misleading

A common mistake is to take the cost per lead from advertising and from SEO and pick whichever is cheaper. The numbers in such a comparison are calculated differently.

• Different queries. The channels can bring in people through different queries: for example, advertising through commercial ones, SEO through informational ones too. Such visitors have different levels of readiness to buy.
• Different timing. In advertising, spend and clicks happen at the same time. In SEO, the work is paid for now, while visitors arrive later and can keep arriving long after a specific improvement was made.
• Different attribution. A person might first read an article found through search, then leave an inquiry after clicking an ad. Which channel gets credit for the lead depends on the attribution model.

It’s fairer to compare the channels for one task and over a comparable period, accounting for what each one actually does. A separate article covers which metrics to use to assess SEO without fooling yourself.

Frequently asked questions

Can you buy a spot in the organic results?

No. Google only sells space for ads; a high position in the search results can’t be bought. Yandex’s materials for advertisers state that buying a spot in the organic results is impossible.

Does advertising in Direct or Google Ads affect a site’s rankings in organic search?

Google states that advertisers don’t get any special advantages or higher rankings. Yandex has no direct statement on this in the help pages we checked; its materials only say that a spot in organic search can’t be bought.

What happens to traffic if you stop advertising?

The ads will stop showing, and visitors from advertising will stop arriving. The organic results are a separate part of the page, and a spot there isn’t purchased. So stopping a campaign by itself doesn’t remove the site from the organic results.

Does SEO work if you need results by a specific date?

Not as the main tool: Google doesn’t guarantee that a page will be indexed and shown, and changes aren’t processed right away. For date-driven tasks, more detail is in the “When each channel fits” section.

Do you need SEO if you already have advertising?

It depends on demand and your time horizon. If queries on the topic are steady and you plan to work with them for a long time, SEO reduces your dependence on paying for every click. How the channels help each other is described in the “How to combine SEO and PPC advertising” section.