What Is Email Marketing and Is It Still Worth It for UK Businesses?

Email marketing is the practice of sending targeted messages to a list of subscribers who have opted in to hear from you. It is one of the oldest forms of digital marketing and, by almost every measure, still one of the most effective.

Despite frequent predictions that social media or messaging apps would overtake it, email has proved remarkably resilient. For UK businesses looking to build relationships with customers, drive repeat purchases, and generate leads without relying entirely on social algorithms, email marketing remains a foundational tool.

How Email Marketing Works

At its simplest, email marketing involves collecting the email addresses of people who are interested in your business, sending them relevant and useful messages on a regular basis, and measuring the results. The list is typically built through website sign-up forms, lead magnets (free resources offered in exchange for an email address), in-store sign-ups, or customer account registration.

Messages are sent via an email service provider (ESP) such as Mailchimp, Klaviyo, Campaign Monitor, or similar tools. These platforms manage list hygiene, provide templates, automate sequences, and give you analytics on open rates, click rates, and conversions. You should never send marketing email from a personal Gmail account or standard email client — it will land in spam and damage your sender reputation.

Email marketing includes one-off campaigns (a newsletter, a promotional offer, a product launch announcement) and automated sequences (a welcome series for new subscribers, a post-purchase follow-up, an abandoned cart reminder for e-commerce). Automation in particular allows you to deliver the right message to the right person at the right time without manual effort for every send.

Why Email Marketing Still Delivers Outstanding ROI

The average return on investment for email marketing is consistently cited at around £35–£42 for every £1 spent, making it one of the highest-ROI channels in digital marketing. Several factors explain this. First, your email list is an asset you own — unlike your social media following, which depends entirely on a platform’s algorithm and policies. If Facebook changes its algorithm or a platform closes, your email list remains yours.

Second, email reaches people in a personal space. Unlike a social media post that competes with a feed full of distractions, an email sits in an inbox awaiting a deliberate decision to open or ignore. For subscribers who genuinely want to hear from you, this creates a direct channel that social media cannot replicate.

Third, email is highly measurable. You know exactly who opened your message, what they clicked, and whether they took a desired action. This makes it relatively straightforward to test and improve over time.

Getting Started With Email Marketing in the UK

Before you begin, make sure you are compliant with UK GDPR. You need explicit consent to add people to a marketing list — pre-ticking a box does not count. Keep records of consent. Make it easy for people to unsubscribe in every email you send. These are legal requirements, not optional courtesies.

Choose an email service provider suited to your business size and budget. Mailchimp has a free tier that suits many small businesses starting out. Set up a double opt-in process so subscribers confirm their sign-up, which improves list quality. Write your first welcome email before you send a single campaign — the moment someone subscribes is when their interest is highest, and a well-crafted welcome message sets the tone for the relationship.