Last updated: September 2026. Advertising only works when you can tell whether it worked. For a small business the decision is not which channel is best in general, but which one reaches people already looking for what you sell, at a cost per enquiry you can afford. Search advertising reaches demand that already exists. Social advertising creates demand that does not. Those are different jobs and confusing them is the most common way small budgets disappear.
Start with the number that matters
Before spending anything, work out what a customer is worth to you: the profit on a first sale, and what they are worth if they come back. That figure sets the ceiling on what you can pay to acquire one.
Then track cost per enquiry and the proportion of enquiries that become customers. Advertising that produces cheap enquiries which never buy is more expensive than advertising producing costly enquiries that do. Businesses that do not measure this cannot tell the difference and usually blame the channel.
Search advertising: capturing existing demand
You pay to appear when someone searches for what you sell. Intent is already there, which is why it converts better than most channels and why competitive terms cost more.
It suits businesses where people actively search: trades, professional services, repairs, legal and financial services, and anything urgent. Keep the landing page specific to the advert. Sending someone searching for a service to a general homepage wastes most of what you paid for the click.
Social advertising: creating demand
You pay to reach people matching a description, whether or not they were looking. It suits visual products, local businesses with a defined catchment, and anything bought on impulse or discovery.
It needs creative that stops someone scrolling, and it fatigues. The same advert shown repeatedly stops working, so budget for producing new material rather than treating creative as a once-off cost.
The channels people forget
A free business listing that appears when people search locally often produces more enquiries for a local business than any paid campaign, and it costs nothing. Reviews on those listings do heavy lifting.
Email to people who already gave you their address converts better than almost anything else, because they know you. Community radio, local print and signage still work in specific markets, particularly township and rural retail, where they can outperform digital.
Referral arrangements with complementary businesses cost nothing until they produce something.
Rules that apply to your advertising
Advertising in South Africa is subject to a code administered by the Advertising Regulatory Board. The requirements that catch small businesses are the ones about substantiation and disclosure: claims must be capable of being supported, comparisons with competitors must be fair, and any paid endorsement, influencer arrangement or affiliate relationship must be disclosed. This applies to a small social account exactly as it applies to a large campaign.
Certain sectors carry additional restrictions, including alcohol, financial services, health and medical claims. If you advertise a regulated product or service, check the sector rules before writing the copy rather than after.
Data, targeting and POPIA
Most digital advertising involves personal information: customer lists uploaded for targeting, tracking on your website, and data collected through lead forms.
That brings obligations under the Protection of Personal Information Act, overseen by the Information Regulator. In practice: have a lawful basis for using the data, tell people what you collect and why, get consent for direct marketing where it is required, and give people a working way to opt out. Buying a list of contacts and marketing to them is the practice most likely to create a problem.
How to spend a small budget
Pick one channel and give it enough budget and enough time to produce a readable result. Splitting a small amount across four channels produces four sets of data too small to learn from.
Run it long enough to see conversions rather than clicks, keep the landing page specific, and change one thing at a time so you know what caused a difference. When something works, increase it gradually rather than all at once, because cost per enquiry usually rises as you scale.
Frequently asked questions
Is search or social advertising better?
They do different jobs. Search captures people already looking, social creates awareness among people who were not. Choose based on whether demand for what you sell already exists.
How much should a small business spend?
No more than the profit a customer is worth, and concentrated on one channel long enough to produce a readable result rather than split thinly.
What should I measure?
Cost per enquiry and the proportion of enquiries that become customers. Clicks alone tell you nothing about whether the spend worked.
Do I have to disclose paid endorsements?
Yes. Influencer arrangements, sponsored posts and affiliate relationships all carry disclosure obligations, for small accounts as much as large campaigns.
Does POPIA affect my advertising?
Yes, wherever you use personal information for targeting, tracking or lead capture. You need a lawful basis, transparency and a working opt-out.
What is the cheapest thing that works?
A complete free local business listing with reviews, and email to people who already gave you their address. Both routinely outperform paid campaigns for small local businesses.
