Introduction to SEO: The Basics You Actually Need to Know

SEO is confusing. Let’s fix that.

When I first started learning about SEO, I felt like I was drowning in acronyms. SERPs, DA, PA, CTR, UX, Core Web Vitals — it felt like everyone was speaking a different language.

And honestly? A lot of SEO advice out there is overwhelming. People will tell you that you need to optimize for 200 different ranking factors, track a dozen metrics, and spend hours every week on “SEO tasks.”

Here’s the thing: most of that is noise.

SEO at its core is simple. It’s about making your content easy for search engines to understand and valuable for the people searching for it.

That’s it.

Let me break down the basics in a way that actually makes sense.

What SEO actually is

SEO stands for Search Engine Optimization. But what does that mean in practice?

Think of it like this: search engines (Google, mostly) want to show the best possible results to their users. They use incredibly complex algorithms to figure out which pages are most relevant, authoritative, and useful.

SEO is the practice of helping those algorithms understand your content and recognize its value.

It’s not about “tricking” Google. It’s not about gaming the system. It’s about clarity, quality, and user experience.

The three pillars of SEO

I like to think of SEO as having three main components:

1. Technical SEO (the foundation)

This is about making sure search engines can actually crawl and index your site. If your site has technical issues, nothing else matters.

Key things to check:

Your site should load quickly (Core Web Vitals matter)
It should work on mobile (mobile-first indexing is real)
URLs should be clean and descriptive
You should have a sitemap
Internal linking should make sense

If you’re on a modern platform like Astro with static output, most of this is handled for you. But it’s still worth understanding.

2. On-page SEO (the content)

This is what most people think of when they hear “SEO.” It’s about optimizing individual pages.

The basics:

Use descriptive titles (H1, H2, etc.)
Write meta descriptions that actually describe the content
Use keywords naturally (don’t keyword stuff)
Include internal links to related content
Add alt text to images

The key word here is “naturally.” Write for humans first, search engines second. If your content is genuinely helpful, you’re 90% of the way there.

3. Off-page SEO (the authority)

This is about building trust and authority. The main factor here is backlinks — other sites linking to yours.

But here’s the thing: you can’t really control this. The best way to get backlinks is to create content that people actually want to link to.

Quality content → people share it → you get backlinks → your authority grows.

It’s a slow process, but it’s the only sustainable way.

What doesn’t matter (as much as you think)

Keyword density: Write naturally. Don’t obsess over how many times a keyword appears.
Meta keywords: Google ignores these. Has for years.
Submitting to search engines: If your site is linked from anywhere, Google will find it.
Perfect scores on SEO tools: They’re useful for diagnostics, but don’t chase perfect scores.
Updating content constantly: Only update when you have something valuable to add.

A simple SEO checklist

If you’re just starting out, focus on these:

Write genuinely useful content that answers real questions
Use descriptive titles (H1) that include your main topic
Write a meta description that accurately describes the content
Make sure your site loads quickly
Ensure your site works well on mobile
Use descriptive URLs (e.g., /your-post-title/ not /?p=123)
Add internal links to related content
Include alt text on images
Publish consistently

That’s it. Do those things well, and you’ll be ahead of most people.

The most important thing

Content that helps people ranks. Content that doesn’t, doesn’t.

I know that sounds obvious, but it’s amazing how many people forget it in pursuit of “SEO tactics.”

Write something useful. Make it easy to read. Make it easy to find. That’s SEO in a nutshell.

Everything else is optimization around those core principles.

Where to go from here

If you want to dive deeper:

Learn about Core Web Vitals (they’re important)
Understand how search intent works
Learn basic technical SEO (crawling, indexing)
Study your analytics to see what’s working

But don’t get overwhelmed. Start with the basics, create good content, and iterate from there.

SEO is a marathon, not a sprint. The sites that win are the ones that consistently create value over time.