Search engine marketing is everything you do to be visible on a results page, which means the ads and the organic listings both. The two are bought differently, measured differently and fail differently, and almost every budget argument we are asked to settle comes from treating them as two versions of the same thing. They are not, and the difference is the useful part.
You will find it defined two incompatible ways in the first page of results, and both are defensible, because the phrase has moved twice in twenty years. Here is the actual history, which is more useful than being told which definition is correct.
In the early 2000s search engine marketing meant everything you did on a search engine, paid and organic together, and search engine optimization was one activity inside it. Material from that era uses the term this way and is not wrong, it is just old.
Through the 2010s the trade press and most platforms used SEM to mean paid search specifically, largely so there was a word that meant "the part you buy" as distinct from the part you earn. This is still the most common usage in a media plan.
As the results page filled up with shopping units, local panels and now AI summaries, the practical question stopped being paid or organic and became which slot on this page can we occupy at all. That question needs the umbrella word back, which is why you see it used both ways.
Ask which one the person means before agreeing to anything. Where it costs real money is a proposal that quotes for search engine marketing and delivers only the half you were not short of.
Not which is better. They answer different questions, and a business usually needs the one it is worse at.
Buying attention on a specific query, today, in a quantity you choose. The only lever in search that works on a deadline.
Building a position that keeps producing after the work stops, and the credibility that decides whether an AI answer names you.
Occupy more than one slot on a page you are competing for, and use each side to inform the other.
Different clocks · paid answers this quarter, organic answers next year, and most businesses need both answers
There is no universal ratio, and anybody who gives you one has not asked enough questions. These are the five that actually decide it.
If revenue has to move this quarter, paid gets the larger share, because organic cannot be made to arrive on a date. If the horizon is a year or more, the weighting inverts and paid becomes the thing that keeps the lights on while the other half builds.
In expensive categories the maths eventually stops working and organic becomes the only affordable route to volume. In cheap ones paid can carry far more of the load than people expect. Look up the real prices before deciding, not after.
Bidding hard on queries where you hold the top organic position is often, though not always, buying a click you were about to get free. Sometimes it is worth it defensively. It should be a decision rather than a default, and it should be tested by pausing and watching.
If the buying happens across thousands of specific, low-volume phrasings, no keyword list will ever cover it economically and organic does the heavy lifting. If demand concentrates in a handful of head terms, paid can own them outright.
A growing share of searches now end in a summary that names a few sources and sends nobody anywhere. You cannot buy your way into that, and it is the newest argument for funding the organic side that has nothing to do with clicks.
One post, quoted as published, from the period when the relationship between Google's paid and organic sides was an open argument in the industry.
The question is, does Google still live up to this separation between paid and organic results?
The answer settled into a plain no in the only sense that matters to an advertiser: spending money does not buy you rankings. What did change is the page itself. Paid units, shopping panels and now AI summaries take up so much of it that the boundary between the two halves matters much less than how far down the earned result now sits.
They insist that Adwords is totally separated from organic search engine placement, that the two are in parallel channels and as such will never meet.
Still the official position and still true as stated. It is worth knowing that the separation is about the ranking systems rather than about your marketing, where the two channels meet constantly: the search terms you pay for are the best content brief you will ever get.
Around 700 posts, published since 2003
Read the archiveThis page is the relationship between them. These are the two practices themselves.
The organic half: the five pillars of search visibility, the three signals that decide whether an AI names you, and how we report rankings in bands rather than averages.
/seo/The paid half: what decides the price of a click, the five paid surfaces, and one real month of an account reported in full.
/ppc/The explainer: how the money works, the four things that have to exist before you spend any, and when we would tell you to skip it.
/pay-per-click-advertising/Send us the search terms you care about and what you are spending now. We will show you where you already rank, what those clicks cost to buy, which of them you are paying for and would have had anyway, and what we would move.