Meta Ads covers Facebook, Instagram, and Messenger through one system. The fundamental difference from search advertising: nobody on these platforms is looking for you. They are scrolling, and your ad interrupts that.
Search advertising captures existing demand — someone already decided they want something. Social advertising creates it, which is a harder job and changes what works.
The consequences are practical: the creative matters far more, because it has to earn attention that was not offered; you generally need to reach people more than once; and expectations should be calibrated to a longer path from first sight to action.
The first choice in any Meta campaign is the objective — what you are asking the system to optimise toward. This matters more than almost any other setting, because the platform will deliver exactly what you asked for.
| Objective category | The system optimises for |
|---|---|
| Awareness | Showing the ad to as many relevant people as possible |
| Traffic | Clicks through to your site |
| Engagement | Reactions, comments, shares, video views |
| Leads | Form submissions or enquiries |
| App promotion | App installs and in-app actions |
| Sales | Purchases or defined conversions |
The objective is the instruction
Choosing the wrong objective is the most expensive common mistake on this platform. Optimise for Traffic when you want sales and the system will faithfully find people who click a lot and buy nothing — it did exactly what you asked. Objective names have been reorganised more than once; match the purpose, not a name you remember.
Start with the simplest format that communicates the idea. Elaborate production is not what makes an ad work, and it makes testing slower and more expensive.
A placement is where the ad appears — feeds, Stories, Reels, and various others across the apps. The important practical point is that these have different shapes: a Story or Reel is full-screen vertical, a feed placement is not.
An ad designed for one and stretched into another looks wrong and performs accordingly. If you use automatic placements, which is often reasonable, supply assets sized for the main formats rather than letting one image be cropped into all of them.
On search, relevance and bidding do much of the work. On social, the creative does. The image or video, the first line of text, and the offer determine most of the outcome — targeting and budget settings matter considerably less than people expect.
This has a direct implication for how to work: test creative continuously, and treat several variations as the normal state rather than a special exercise. It is also why creative fatigue is a real phenomenon here — an ad that performed well will decline as the same audience sees it repeatedly, and refreshing it is routine maintenance rather than a sign something went wrong.