Digital Marketing Channels

When marketers say they are “running campaigns across channels,” they mean the different places online where they reach people. Each channel has its own rhythm, cost and audience, and most companies use several at once. You do not need to run any of them to follow the conversation — you just need to know what each one is for and how anyone can tell whether it is paying off.

The main channels

SEO (search engine optimisation) is the work of making your website show up high in unpaid Google results when someone searches a relevant term. It is slow to build but, once it ranks, the traffic keeps coming without paying per click. Paid search or SEM (search engine marketing) is the opposite trade-off: you bid to appear as an ad at the top of those same results and pay each time someone clicks. It is instant but stops the moment you stop paying.

Social media covers platforms like LinkedIn, Instagram and TikTok — used both for free posting and for paid ads aimed at very specific audiences. Email marketing reaches people who already gave you their address; it is cheap and personal, which makes it one of the highest-returning channels. Content marketing — blog posts, guides, videos — feeds all of the above by giving people something useful to find, read and share.

Organic vs. paid, and the three kinds of media

Two words cut across every channel: organic and paid. Organic means results you earn without paying for placement — a blog post that ranks, a post that spreads, an email people open. Paid means you bought the placement: an ad, a sponsored post, a promoted listing. Organic is slower and cheaper over time; paid is faster and switchable but costs money every time.

A cleaner way to file all of this is owned, earned, and paid media. Owned media is anything you control — your website, your email list, your blog. Earned media is exposure others give you for free — a press mention, a customer review, a share. Paid media is anything you pay to place — ads, sponsorships, promoted posts. The healthiest marketing mixes all three: owned to build a home base, earned to build trust, paid to reach further and faster.

The numbers that matter

Marketing can feel fuzzy until you meet the metrics, which are reassuringly concrete. CTR (click-through rate) is the share of people who saw something and clicked it — 100 clicks from 5,000 views is a 2% CTR. It tells you whether the message was tempting enough to act on.

CPC (cost per click) is what you pay each time someone clicks a paid ad. Conversion rate is the share of visitors who do the thing you wanted — buy, sign up, book a demo. A page with lots of clicks but a low conversion rate is attracting people who do not stick. Finally, CAC (customer acquisition cost) is the all-in amount you spend to win one new customer: total marketing spend divided by customers gained. It is the one number leaders care about most, because it answers “is this worth it?”

Rule of thumb: clicks are encouraging, but conversions pay the bills. Always ask what a campaign cost to acquire an actual customer, not just a click.

Spot it: channels and media types

Read each example and decide for yourself, then tap a card to flip it and check your answer.

Sort the channels

Drag each activity into the channel it represents — or tap an item, then tap a bucket. Hit Check placement when you’re done.

How to use it

You do not need a marketing title to ask sharp questions. When someone reports a campaign, try: “Is that organic or paid?” and “Is this owned, earned or paid media?” When the numbers come up, ask “What’s the conversion rate, not just the clicks?” and “What did it cost us to acquire a customer?” If a channel looks cheap per click but the CAC is high, you can point out that traffic and customers are not the same thing. These phrases signal that you read past the vanity numbers to the ones that decide whether the spend made sense.