What is social media advertising?
Also called social ads, social media ads, paid social ads.
Social media advertising is paying a social platform such as Facebook, Instagram, TikTok, LinkedIn or YouTube to show your message to people you choose, by location, age, interests or past contact with your business.
Why it matters
Social platforms know a lot about what their users do and like, so even a small business can put an ad in front of a narrow, relevant group, such as parents within five miles or office managers in one city, and stop or change it at any time. That precision is what separates social ads from a flyer or a radio spot.
Example
A local driving school runs a short video ad on Instagram and Facebook showing a pupil's first lesson, filmed with permission. It targets people aged 17 to 25 in its town, sets a daily budget and an end date, and measures success by the number of booking enquiries it receives.
How social media ads work
Most platforms sell ads through an auction. You tell the platform your goal, who you want to reach, how much you are willing to spend and for how long. Each time someone in your audience is scrolling, the platform decides which ad to show based on the advertisers' bids and how relevant it predicts each ad will be.
You are usually charged for impressions (often reported as CPM, cost per 1,000 impressions) or for an action such as a link click (CPC, cost per click), depending on the goal and settings you choose. Your budget caps what you spend.
Choosing a platform
Pick the platform where your customers already spend time, not the one with the most hype.
- Facebook and Instagram: broad local reach, run from one place through Meta's ad tools.
- TikTok: short vertical video, suits products that are fun to show.
- LinkedIn: reach people by job title, industry or company, useful for business-to-business services.
- YouTube: video ads before or during videos, and in Shorts.
- Pinterest: people planning purchases, such as home, wedding, food and fashion.
- X: conversation and news-led audiences.
Rules to know before you advertise
Every platform reviews ads against its own advertising policies, and some categories are restricted. Meta, for example, asks advertisers to mark ads about financial products and services, employment, housing, social issues, elections or politics as a Special Ad Category, which limits some targeting options. Health, alcohol, gambling and age-restricted products have extra rules almost everywhere.
Local consumer law applies to ads too: prices, claims and offers must be true, and paid partnerships must be disclosed. If you are unsure, read the platform's advertising policy before you spend.
When not to advertise yet
Wait if you don't yet know which message makes customers act. Organic posts are a free way to find out. Wait too if your website or booking page is slow or confusing, because an ad will send people there and they will leave. And don't advertise without a way to measure results: use the platform's own conversion tools or UTM parameters on your links, so you can see which ads brought customers.
Common questions
How much should a small business spend on social media ads?
There's no right number. Start with an amount you could afford to lose while learning, run it for a fixed period, and judge it by cost per enquiry or sale. Increase spend only on ads that pay their way.
Which is better, Facebook ads or Instagram ads?
They're bought through the same Meta tools, and one campaign can run on both. Choose placements based on where your customers spend time, then compare results.
Do I need an agency to run social media ads?
No. Boosting a post or running a simple campaign is designed to be done by business owners. An agency or freelancer helps when budgets grow or you want detailed testing.
Sources: Meta Business Help Centre: boost a post (Special Ad Category), checked 14 October 2026; Meta Business Help Centre: CPM, checked 14 October 2026; Meta Business Help Centre: CPC (cost per link click), checked 14 October 2026