Digital marketing is any marketing activity carried out through digital channels: search engines, social media, paid ads, email, websites and apps. The essential difference from traditional marketing is not the medium but measurability: you can know how many people saw a message, how many clicked, how many bought and what each customer cost.

The core digital marketing channels

1. Paid advertising

Ads you pay for on Meta (Facebook and Instagram), Google, TikTok, Snapchat and LinkedIn. The fastest channel to results, and the fastest way to waste money if run without measurement. This is the work of a media buyer.

2. Search engine optimisation (SEO)

Showing up when people search for your service or product on Google without paying per click. Slow at the start, but it keeps working after you stop spending.

3. Social media marketing (organic)

Building presence and audience through posting and engagement. Useful for trust and awareness, but rarely enough on its own for regular sales in today's market.

4. Content marketing

Articles, videos and guides that answer your customer's questions before they buy. It feeds SEO and social at the same time, and builds an expert reputation.

5. Email and messaging

Email, WhatsApp and SMS. The cheapest channel for reaching people who already know you, and the strongest for repeat purchase.

How to choose the right channels

The simple rule: start where your customer is, and when they are ready to buy.

  • If people already search for your product ("plumber in Riyadh", "buy a laptop"), Google Ads and SEO come first.
  • If your product needs to be discovered (something new, or a solution to a problem people do not know can be solved), Meta and TikTok fit better.
  • If you sell to businesses, LinkedIn and Google usually matter more than TikTok.
  • If you have existing customers, email and WhatsApp are the cheapest route to more sales.

Do not try to be everywhere on day one. One or two channels run well beat five channels run with half your attention.

How to know digital marketing is working

This is where most owners fall into the trap: they measure activity instead of outcome. Followers, likes and reach are comfortable numbers, but they do not pay salaries.

The numbers that matter:

  1. Customer acquisition cost (CAC): what did it cost to get one customer?
  2. Return on ad spend (ROAS): and is it above break-even? See break-even ROAS.
  3. Customer lifetime value (LTV): what does a customer pay over the relationship?
  4. Conversion rate: out of every 100 visitors, how many buy?

These and more are explained in the ad metrics glossary.

Common mistakes

  • Tools before strategy: opening accounts on every platform before knowing who the customer is and what they want.
  • Judging a channel after one week: most channels need time to test and learn.
  • Neglecting the website or landing page: the best ad in the world fails if it lands on a slow or confusing page. See the landing page that sells.
  • No measurement set up: without correct tracking you will not know which channel makes money. See the Pixel and Conversions API guide.

Where to start

  1. Define your customer precisely: who they are, their problem, where they spend time online.
  2. Work out your core numbers: margin, average order value and the maximum customer cost you can carry.
  3. Choose one or two channels to start with.
  4. Set up measurement before spending.
  5. Test, measure and repeat what works.

A more detailed plan is in a digital marketing plan for a new business. For the basic definitions from an outside source, HubSpot's guide to what digital marketing is is a good reference.

The bottom line

Digital marketing is not a list of platforms, it is a system: a clear customer, suitable channels and measurement that ties every unit spent to a result. If you want someone to run the part with the biggest effect on sales, paid advertising, see the freelance media buyer page.