Type "emergency plumber" into Google and you'll see ads within a second. Scroll Instagram for ten minutes and you might see an ad for a weighted blanket, a course on watercolor painting, or a subscription box you never asked for. Both are paid ads. Both cost money per click or per impression. But they are solving two completely different problems, and treating them like interchangeable tools is one of the fastest ways to waste an ad budget.
Two Different Kinds of Buyer Intent
Google Ads shows up when someone already has a problem and is actively looking for a fix. They typed the words. They know, at least roughly, what they want. Your job is to be the answer that shows up first and looks the most trustworthy.
Facebook Ads (and Instagram, since they share the same ad system) works differently. Nobody opens Instagram because they need a new mattress. They open it to see what their cousin posted. Your ad has to interrupt that scroll and create a want that wasn't there thirty seconds earlier.
Think of it this way:
- Google Ads answers a question someone already asked.
- Facebook Ads asks a question someone wasn't expecting.
That single difference changes almost everything about how you write the ad, who you target, and what you should expect it to cost you.
What Google Ads Is Built For
Google Ads is a search-intent tool. It works best when:
- People search for your exact product or service by name ("QuickBooks alternative for freelancers")
- The problem is urgent or specific ("AC repair same day")
- The buyer already knows enough to compare options
Because the person is already looking, Google Ads tends to convert at a higher rate for bottom-of-funnel searches, but it also tends to cost more per click, especially in competitive categories like insurance, legal services, or SaaS. You're not creating demand. You're buying your way to the front of a line that already exists.
A local example: a small HVAC company doesn't need to convince anyone that air conditioning is a good idea. They need to be the first result when someone's unit breaks in July. That's a search-intent problem, and Google Ads is built to solve exactly that.
What Facebook Ads Is Built For
Facebook Ads is an interest and behavior tool. It works best when:
- The product is new enough that people aren't searching for it by name yet
- The purchase is more impulse-driven or aspirational (skincare, apparel, home goods, hobbies)
- You want to build awareness before someone ever thinks to search
Facebook's targeting works off of interests, past behavior, and lookalike audiences built from your existing customers. You're not answering a search. You're guessing, based on data, who is likely to care about what you're selling, and then showing up in their feed before they knew they wanted it.
This is why a direct-to-consumer brand launching a new product almost always starts on Facebook or Instagram rather than Google. There's no search volume yet for "vegan protein bar with adaptogens" because nobody knows to look for it. You have to introduce the idea first.
How to Decide Which One to Use First
Ask yourself one question: does the customer already know they have this problem?
If yes, start with Google Ads. Someone searching "best CRM for real estate agents" already knows their spreadsheet system is broken. You just need to be the visible, credible answer.
If no, or if it's a maybe, start with Facebook Ads. A new productivity app, a niche subscription box, or a service most people haven't heard of needs to create the want before it can capture the search.
A simple gut check:
- Is there decent search volume for what you sell? Go to Google.
- Is your product something people discover rather than search for? Go to Facebook.
- Is your average order value high enough to justify a longer, multi-touch journey? You likely need both, at different stages.
One honest caveat: this isn't a hard rule. Plenty of businesses run both platforms successfully at the same time. The point isn't "pick one forever." It's understanding what job each platform is actually good at before you set a budget.
Running Both Without Wasting Money
In our experience, the businesses that get the most out of paid ads eventually use both platforms, just for different jobs in the same funnel.
A common structure looks like this:
- Facebook or Instagram ads introduce the brand or product to a cold audience based on interests.
- Some of those people don't buy immediately, but they remember the name and later search for it on Google.
- Google Ads (including a branded search campaign) catches that follow-up search and closes the sale.
This is why some businesses see a lift in branded Google searches after running a Facebook campaign. Facebook created the awareness. Google captured the intent that awareness produced.
The mistake to avoid is running both platforms with the same message and the same expectations. A search ad should speak directly to the problem someone typed in ("Same-day AC repair in [city]"). A social ad needs to stop the scroll first, often with a visual, a relatable pain point, or a short story, before it ever mentions price or features.
Common Mistakes to Avoid
- Using search-style copy on Facebook. Nobody scrolling Instagram responds to "Click here to learn about our enterprise pricing tiers."
- Using broad interest targeting on Google. If someone typed an exact phrase, don't make them guess what you sell from a vague headline.
- Expecting the same cost-per-click on both. Search ads for competitive terms are usually more expensive per click because you're bidding against people who already know they want to buy.
- Judging Facebook ads only by immediate purchases. A lot of their value shows up later, in direct traffic or branded search, not in the first click.
What To Do Next
Start by identifying whether your buyer already knows they have the problem you solve. If they're actively searching for a solution, put your first budget into Google Ads and focus on matching the exact intent of their search terms. If you're introducing something new or your product is more of a want than an urgent need, start with Facebook or Instagram ads built around a strong visual and a clear hook.
If you have budget for both, use Facebook to build awareness with people who don't know you exist, and use Google (including a branded campaign with your company name) to catch the people that awareness sends looking for you later. Track branded search volume before and after a social campaign. That's usually the clearest sign of whether your interest-based ads are doing their job.