Paid Search
Paid search is the practice of bidding on keywords to display ads at the top of search engine results pages. Ad formats include text, responsive, and shopping ads, with users signaling active intent by typing a query and pricing set in real time by auction (max bid multiplied by Quality Score equivalent). It is the workhorse of paid acquisition for any business whose customers actively search for what they sell, and the channel where intent signals are richest.
The two major platforms by spend are Google Ads (running on Google Search, Search Partners, and Google Shopping) and Microsoft Ads (running on Bing, Yahoo, AOL, and DuckDuckGo via their partnership). Google holds roughly 83 percent of global search market share in 2025, with Microsoft, Yahoo, and DuckDuckGo combined sitting near 9 percent (StatCounter and Statista data). The principal ad formats are responsive search ads (the modern default; Google rotates headline and description combinations algorithmically), expanded text ads (deprecated in 2022 but still relevant context), Performance Max campaigns (cross-surface AI-driven campaigns including Search, Display, YouTube, Gmail, Maps), shopping ads (product-feed-driven, dominant for e-commerce), and dynamic search ads (Google generates ads from your site content). Two structural advantages over other paid channels: intent (the searcher just typed what they want, so search ads convert at roughly 3 to 5x the rate of display or paid social on most categories) and measurement clarity (the keyword that triggered the click is itself a signal of buyer stage). Paid search CPCs vary 100x across industries; the channel rewards businesses with high LTV and tight CAC-to-LTV discipline because the auction rewards advertisers who can afford to bid more.
Ryan's Take
Paid search is the channel where startups grow up. It is the most disciplined, most measurable, and most ruthless of the paid channels. Bad campaigns lose money in real time, good campaigns scale linearly with budget, and there is nowhere to hide. That is exactly why it is the best place to learn marketing as a founder. You find out fast whether your offer, your landing page, and your targeting work. If you cannot make paid search work at small budget, scaling the budget rarely fixes it. The auction is honest in a way few other channels are.
What founders get wrong: Bidding on broad-match keywords without a tight negative keyword list. Broad match with no negatives is how you end up paying $4 for clicks from people searching "free" versions of your product, or for queries that share words with yours but mean something completely different. Aggressive negative keyword hygiene is the single highest-ROI Google Ads activity for most startups.
Related: SEM · SEO · Keyword Research · Cost Per Click · Paid Acquisition
FAQ
What is paid search?
The practice of bidding on keywords to display text, responsive, or shopping ads at the top of search engine results pages, where users have signaled active intent by typing a query, and where pricing is set in real time by auction.
What are the main paid search platforms?
Google Ads (running on Google Search, Search Partners, and Google Shopping) and Microsoft Ads (running on Bing, Yahoo, AOL, and DuckDuckGo). Google holds roughly 83% of global search market share in 2025; Microsoft, Yahoo, and DuckDuckGo combined sit near 9% (StatCounter, Statista).
Why does paid search convert so well?
Two structural advantages: intent (the searcher just typed what they want, so search ads convert at roughly 3-5x the rate of display or paid social on most categories) and measurement clarity (the keyword itself signals buyer stage, making campaign optimization more direct than on intent-blind channels).
Find this article helpful?
This is just a small sample! Register to unlock our in-depth courses, hundreds of video courses, and a library of playbooks and articles to grow your startup fast. Let us Let us show you!
Submission confirms agreement to our Terms of Service and Privacy Policy.