Search ads: reaching buyers who are already looking

Imagine two ways to sell lemonade.

Way 1: You walk around a park calling out "Lemonade! Lemonade!" Some people stop. Most walk past.

Way 2: You put up a sign that says "Lemonade here" at the park exit on a hot day. People walk up to you because they are already thirsty. But the sign still needs to be in the right spot with the right words — being visible to a thirsty crowd is only the starting point.

This difference — reaching people who are already looking versus trying to create interest from scratch — is at the core of how search ads work. The rest of this lesson explains the mechanics.

Advertising generally falls into two broad categories.

Category 1: You reach them

You show ads to people who are doing something else. They are watching videos, scrolling through photos, reading articles. Your ad appears alongside their activity.

Examples:

• Ads on Instagram while someone looks at friends' photos
• Video ads before YouTube videos
• Banner ads on websites

The challenge: These people were not thinking about your product. The ad needs to get their attention and make them interested enough to act — because without that first moment of attention, the ad is ignored.

Category 2: They reach you

Your ad appears because someone searched for what you sell. They typed words into Google. They are looking for an answer.

Examples:

• Someone searches "best running shoes" and sees your shoe ad
• Someone searches "plumber near me" and sees your plumbing ad
• Someone searches "accounting software for freelancers" and sees your software ad

The difference: The ad does not need to create interest from scratch — it needs to be a relevant answer to the searcher's question. However, the searcher still sees multiple results and ads on the page, so the ad still needs to stand out.

Intent is what someone is trying to accomplish when they search. A person who types "buy running shoes" has higher intent than someone casually scrolling Instagram — they are actively looking for something specific. When intent is higher, ad performance tends to change in a few ways.

Click rates tend to be higher

A click-through rate is the percentage of people who see an ad and click on it. Industry estimates suggest social ad click-through rates are often around 1-2%, while search ads can reach 3-10% depending on the search term and how closely the ad matches what the person is looking for.

Conversion rates tend to be higher

A conversion rate is the percentage of people who take the desired action (such as buying) after clicking an ad. Someone who searches "buy laptop" is generally closer to purchasing than someone who sees a laptop ad while scrolling — though they may still be comparing options or researching.

A different starting point

With social ads, the ad needs to:

1. Get attention
2. Create interest in the product
3. Convince the person to click
4. Then convince them to buy

With search ads, the searcher has already shown interest by typing a query. The ad still needs to stand out among other results and convince the person to click, but the starting point is different.

Here is an example comparing two campaigns with the same budget. These numbers are illustrative — actual results vary by product, market, and execution.

Campaign A: Social ads

• Budget: $1,000
• Cost per click (CPC — how much you pay each time someone clicks your ad): $1
• Clicks: 1,000
• Conversion rate: 2% (20 sales)
• Cost per sale (total ad spend ÷ number of sales): $50

Campaign B: Search ads

• Budget: $1,000
• CPC: $2 (search clicks often cost more because advertisers bid — compete in an auction — and are willing to pay more for clicks from people who are actively looking, since those clicks are more likely to result in a sale)
• Clicks: 500
• Conversion rate: 5% (25 sales)
• Cost per sale: $40

In this example, search clicks cost more per click but convert at a higher rate, resulting in a lower cost per sale ($40 vs $50). The gap may be larger or smaller depending on the product, the competition for those searches, and how well the ad and landing page (the webpage a person sees after clicking your ad) match what the searcher wants.

Not all searches are equal. Understanding what someone types tells you how ready they are.

Just looking around

• "What is the best type of running shoe"
• "How do I choose accounting software"
• "Difference between running shoes"

These people are early. They are researching — they have not decided they need the product yet, so they might buy later or might not buy at all.

Comparing options

• "Nike vs Adidas running shoes"
• "Quickbooks vs Freshbooks"
• "Best accounting software for freelancers"

These people are closer. They know they want something, and they are deciding between options.

Ready to buy

• "Buy Nike Air Max online"
• "Quickbooks pricing"
• "Accounting software free trial"

These people are close to a decision. They know roughly what they want and are looking for where to get it.

The closer to buying, the more valuable the search. But also the more expensive — because search ads use an auction system, and when more advertisers compete for the same high-intent search, the price per click goes up.

Search ads only work if people search for what you sell — because search ads are triggered by typed searches, so if nobody types those words, the ad has no trigger to appear.

New products nobody knows about

If a product is completely new, nobody is searching for it. Search ads require existing search demand. For new product categories, awareness-based ads (social, video, or display ads — banner and image ads shown on websites) are typically needed first to introduce the concept.

Small niche with few searches

If only 50 people per month search for a particular product type, there is not enough volume to build a campaign on search ads alone — because even with a high click rate and conversion rate, 50 searches would yield only a handful of sales per month. Other channels may be needed to supplement.

Cost per click is too high

Some searches cost $20-50 per click because competition is high. If the profit from each sale cannot support that cost, search ads may not be viable — because you would spend more to acquire each customer than you earn from them. Example: in some legal categories, clicks can cost $100 or more per click, which only works if each client generates thousands in revenue.

Long decision process

If people take months to decide (expensive purchases, business software), one search ad click is not enough. They might click today and buy six months later. Measuring the return on these campaigns requires longer time frames and tracking beyond the initial click.