What Is Email Marketing? The Complete Beginner's Guide for 2025

What is email marketing? It's the practice of sending commercial messages to a group of people via email. But that clinical definition undersells what email marketing really is: the highest-ROI marketing channel available today.

This guide explains email marketing from the ground up—what it is, why it works, and how to get started.

Email Marketing Defined

Email marketing is sending emails to people who've given you permission to contact them. These emails can:

• Promote products or services
• Share valuable content
• Build relationships over time
• Drive specific actions

The key difference from spam: Permission. Your subscribers chose to hear from you.

Why Email Marketing Works

The Numbers

The data makes a compelling case:

• $36-42 return for every $1 spent (highest ROI of any channel)
• 4.6 billion email users worldwide by 2025
• 99% of consumers check email daily
• 77% of people prefer email for promotional messages
• Email converts 174% better than social media

Why It Outperforms Other Channels

You own the list: Unlike social media followers, you control your email list. No algorithm changes can take it away.

Direct access: Email goes straight to someone's inbox—no feed algorithm deciding if they see it.

Permission-based: People who subscribe actually want to hear from you.

Measurable: Every open, click, and conversion is trackable.

Types of Email Marketing

1. Newsletters

Regular emails sharing content, news, or updates.

Goal: Build relationship and stay top of mind.

Examples: Weekly tips, company news, curated content

2. Promotional Emails

Emails promoting products, services, or offers.

Goal: Drive sales.

Examples: Sales announcements, new products, limited offers

3. Transactional Emails

Triggered by user actions.

Goal: Provide expected information.

Examples: Order confirmations, shipping updates, password resets

4. Automated Sequences

Pre-written emails sent based on triggers.

Goal: Nurture and convert automatically.

Examples: Welcome series, abandoned cart, re-engagement

5. Lifecycle Emails

Emails based on customer journey stage.

Goal: Move people through your funnel.

Examples: Onboarding, upsells, win-back campaigns

How Email Marketing Works

The Basic Flow

1. Build a list — Collect email addresses with permission
2. Choose a platform — Mailchimp, Brew, etc.
3. Create emails — Write and design your messages
4. Segment and send — Target the right people
5. Measure and optimize — Track results, improve

Key Metrics

Metric	What It Measures	Good Benchmark
Open rate	% who opened	20-30%
Click rate	% who clicked	2-5%
Conversion rate	% who completed goal	1-5%
Unsubscribe rate	% who left	<0.5%
Bounce rate	% undelivered	<2%

Getting Started With Email Marketing

Step 1: Choose an Email Platform

Popular options:

Platform	Best For
Brew	AI-powered creation
Mailchimp	General small business
ConvertKit	Creators
Klaviyo	E-commerce

See our email marketing platforms comparison.

Step 2: Build Your Email List

Start collecting emails:

• Website signup forms
• Lead magnets (free guides, templates)
• Checkout opt-ins
• Social media promotion

Important: Never buy email lists. It destroys deliverability and is often illegal.

See our email list building guide for tactics.

Step 3: Set Up Key Automations

Start with these essential automations:

1. Welcome email — Greet new subscribers immediately
2. Welcome sequence — 3-5 emails nurturing new signups
3. Abandoned cart (e-commerce) — Recover lost sales

Step 4: Create Your First Campaign

Start simple:

• One clear goal
• Short, focused content
• Clear call-to-action
• Mobile-optimized design

Step 5: Measure and Improve

After each send:

• Review open and click rates
• Note what worked
• Test improvements
• Apply learnings

Email Marketing Best Practices

List Building

✅ Get clear permission (double opt-in ideal) ✅ Set expectations at signup ✅ Deliver promised content immediately

❌ Never buy or rent lists ❌ Don't add people without consent ❌ Don't hide what they're signing up for

Content

✅ Provide value before asking ✅ Keep it scannable ✅ One clear CTA per email ✅ Write like a person, not a brand

❌ Don't be all promotion, no value ❌ Don't send walls of text ❌ Don't confuse with multiple CTAs

Deliverability

✅ Clean your list regularly ✅ Use authentication (SPF, DKIM, DMARC) ✅ Monitor engagement metrics

❌ Don't send to old, cold lists ❌ Don't ignore bounces ❌ Don't overuse spam trigger words

Common Email Marketing Mistakes

1. Buying lists — Destroys deliverability, often illegal
2. No welcome email — Wastes peak subscriber interest
3. Inconsistent sending — Hurts engagement and trust
4. Ignoring mobile — 60%+ opens are on mobile
5. No testing — Missing optimization opportunities
6. All selling, no value — Subscribers tune out

Email Marketing Laws

Key Regulations

CAN-SPAM (US)

• Must have unsubscribe option
• Physical address required
• No misleading subjects

GDPR (EU)

• Explicit consent required
• Right to be forgotten
• Clear privacy policy

CASL (Canada)

• Express consent needed
• Identification requirements
• Unsubscribe mechanism

The Future of Email Marketing

Email isn't going anywhere. But it's evolving:

• AI-powered creation — Generate emails in seconds
• Hyper-personalization — Content tailored to each subscriber
• Interactive emails — AMP emails, in-email actions
• Privacy-first — Adapting to tracking limitations

Start Your Email Marketing Journey

Email marketing is one of the most valuable skills in digital marketing. Start simple:

1. Choose a platform — Brew makes it easy with AI
2. Build your list — Start with a simple signup form
3. Send your first email — Done beats perfect
4. Learn and improve — Every email teaches you something

Ready to get started? Try Brew free and create your first email in under 60 seconds.

Start email marketing →