Paid advertising is renting attention you have not earned yet. Done with discipline, it is a dial you can turn to buy predictable customers; done carelessly, it is the fastest way to set money on fire. This module maps the major platforms by the kind of demand each captures, and drills the maths and mechanics that separate profitable spend from expensive noise.
The great divide: capturing vs creating demand
Google Ads captures existing demand, someone already searching 'plumber near me' has intent, you just win the click. Social ads (Meta, TikTok) create demand, they interrupt someone who was not looking and make them want your thing. Search tends to convert faster; social tends to be cheaper to reach and better for discovery. Most businesses need both, for different jobs.
The platforms, by the intent they capture
- Google Ads: search intent. You appear when people search for what you sell. High intent, high conversion, you pay per click. Includes YouTube and the display network.
- Meta Ads Manager (Facebook and Instagram): the workhorse for most SMEs. Powerful interest, behaviour and lookalike targeting; excellent for discovery and retargeting; relatively cheap reach.
- TikTok Ads Manager: youthful, video-first, currently cheap reach and strong for products with visual or viral appeal.
- LinkedIn Campaign Manager: business-to-business targeting by job title, company and industry. Precise but expensive per click, worth it only for high-value B2B offers.
- X Ads: reach on X (Twitter); niche, useful for real-time and tech or media audiences, a smaller player for most SMEs.
The anatomy of any campaign
- Objective: what you are optimising for (traffic, leads, sales). The platform spends your money toward this goal, so choose it honestly.
- Audience: who sees it, by interest, behaviour, a lookalike of your customers, or a retargeting list of people who already visited.
- Creative: the actual ad, image or video plus copy. This is the single biggest lever on performance.
- Budget and bidding: how much per day, and how the platform bids for you in the auction.
- The pixel / conversions API: a snippet on your site (or a server feed) that reports back which ad led to a sale, so the platform can optimise and you can measure ROAS.
Ads expose the funnel, they do not fix it
If you send 1,000 paid clicks to a page and nobody buys, the ad is rarely the main problem, the offer, the landing page or the trust is. Ads pour traffic onto whatever you have; a leaky funnel just leaks faster and more expensively. Get a modest offer converting with cheap or organic traffic first, then pay to amplify what already works.
The discipline: know your numbers before you spend
Two numbers keep ad spend honest. CAC (Customer Acquisition Cost) is what you pay in ads to win one customer. Break-even is the point where the profit from that customer covers their CAC. If a customer is worth 2,000 in profit, you can spend up to 2,000 to acquire one and still be even, less than that, you profit. ROAS (Return on Ad Spend) tracks revenue earned per shilling spent. Start with a small daily budget, measure CAC against break-even, kill what loses and pour budget into what wins. Scaling a campaign you have not proven is how budgets vanish.
The African-SME reality: retarget the warm, start tiny
The cheapest, highest-return ads are usually retargeting, showing an ad to people who already visited your page or WhatsApp, not cold strangers. Install the Meta pixel early so you build that audience from day one. Start with a budget you can afford to lose entirely while you learn (even a few hundred shillings a day), treat the first weeks as paid tuition, and only scale once a campaign clears break-even.
Check your understanding
A plumber and a fashion brand each have one ad budget. Where should each start, given how the platforms differ?
Check your understanding
An owner sends 1,000 paid clicks to a landing page and gets zero sales, then asks how to make the AD better. What is the more accurate diagnosis?
Exercise · try it first
Plan a disciplined first campaign. (1) Choose the platform whose intent matches your offer and justify it. (2) Write the campaign's objective, one audience (ideally a retargeting or lookalike audience), and the core creative idea. (3) Do the maths: estimate the profit per customer, so your maximum affordable CAC, and set a small daily test budget you could lose without pain. (4) Define your kill/scale rule: the CAC or ROAS threshold at which you cut the campaign, and the one at which you increase budget.