Choose Google ads if your customer is already searching for what you offer, and choose Facebook and Instagram ads if they do not know they need your product until they see it. Google catches existing demand, while Meta creates new demand. On a limited budget, start with the one platform that fits this, and add the second once you know your cost per sale from the first.
You will find a decision table by business type, a calculation that shows if your budget covers one platform or two, and a way of comparing them that does not rely on each platform's report about itself.
The basic difference between Google ads and Meta ads
The difference lies in the customer's state of mind when the ad appears. On Google, a person types what they want and your ad answers. On Facebook and Instagram, they are browsing something else and your ad interrupts them.
| Point | Google ads (Search) | Facebook and Instagram |
|---|---|---|
| Customer's state | Searching for a solution now | Not searching, discovering the offer |
| Who sees the ad | Set by the keywords they type | Set by interests, behavior and platform signals |
| What makes the difference | Keyword choice and the landing page | The video or image and the opening message |
| Reach | Limited by how many people search | Wider, not tied to search |
| Typical lead quality | Higher intent, and costlier clicks in competitive fields | More leads that need more filtering |
| Common payment | You pay when someone clicks | You pay by goal, often for impressions |
The lead quality row reflects general practical experience and is no fixed rule. A good Meta campaign can bring better customers than a loose, broad search campaign, which is why the final decision depends on numbers you gather yourself.
A decision table by business type and customer intent
| Your business | Start with | Why |
|---|---|---|
| An urgent service or clear need, such as repairs, a lawyer or a specialist clinic | The customer searches at the moment of need | |
| B2B services with known names, such as accounting software | Fewer searchers, with clearer intent | |
| A visual consumer product, such as clothes or cosmetics | Meta | The image creates the desire, and nobody searches for a brand they do not know |
| A new product people cannot name yet | Meta | There is not enough search to catch |
| A restaurant or local offer | Meta, with local presence on Google | A nearby, appealing ad, then a search for the place when deciding |
| Property or cars | Both, if the budget allows | Meta widens reach, and Google catches those who reach the search stage |
| An online store with products people ask for by name | Google, then Meta for retargeting | Someone searching for the product is close to buying |
Test this quickly. Open Google's Keyword Planner, type what your customer usually types, and try different dialects. If search volume in your country is tiny, Google will not even spend your budget, and starting on Meta looks more sensible. Also confirm you may advertise your business the way you want, since medical, financial and other fields face limits under Meta's policies and Google's policies.
Is your budget enough for one platform or two
Each platform needs a number of results to learn and for you to judge it fairly. Meta says an ad set gets the "Learning limited" label when it is unlikely to reach around 50 optimization events in the week after the last significant edit. Google recommends measuring Smart Bidding over periods with at least 30 conversions, such as a month or longer.
A hypothetical example with an expected cost per lead of 200 on each platform:
- Meta: 50 leads × 200 = 10,000 a week for one ad set, if the goal is the lead itself.
- Google: 30 leads × 200 = at least 6,000 a month for a first read of the result.
A smaller budget does not make advertising impossible, but expect less stable results. On Meta, for example, you can pick a more frequent event such as add to cart instead of purchase, which Meta itself suggests, and focus on one platform and one service. The full method is in how to split your first ad budget.
How to compare the two fairly
Do not compare using each platform's dashboard. Each credits sales to itself in its own way, and together they can claim more than you actually sold. Compare with these steps instead:
- Tag links with UTM parameters so visits arrive separately in analytics. See setting up conversion tracking.
- Record the source of each lead in your sales sheet or CRM.
- After enough time, work out cost per lead, cost per qualified lead and cost per deal for each platform.
- Read the result by profit, and not by sales alone, as in why ROAS alone is not enough.
The numbers may show the platforms working together. A customer sees an Instagram ad, searches your name on Google days later, and buys. If you stop Meta because Google "made the sale", searches for your name may drop later. So change one platform at a time and watch total sales.
Mistakes that waste budget on each platform
On Google
- Broad keywords with no review of the search terms report.
- Neglecting negative keywords, so you pay for people looking for jobs or free services.
- Sending every keyword to the home page instead of a matching landing page.
On Facebook and Instagram
- Staying on one ad until the audience tires of it.
- Judging on day two, and changing the campaign daily during learning.
- Counting every instant form lead as a serious customer, without tracking quality in sales.
Your next step
Find your business in the decision table, check search volume, and work out the minimum budget. Run one platform for one service for four weeks with proper measurement, then decide based on cost per deal. The launch, monitor and adjust cycle is covered in media buying. If you prefer a specialist team to run campaigns, that is PlanKit's media buying service.
If your wider question is organic search or ads, see SEO or paid ads first.