The Most Common SEO Mistakes (Even Pros Still Make)

Search Engine Optimization (SEO) has a lot of moving parts, which makes it easy to miss the basics. These simple mistakes show up on sites of all sizes—and they can quietly hurt rankings, traffic, and user experience.

Mistakes We See All the Time

• Missing or Duplicate Metadata — Every page needs unique titles and descriptions.
• No H1—or Too Many — One clear H1 helps Google understand your content.
• Weak Internal Linking — Links guide users and spread ranking power.
• Keyword Stuffing — Google rewards answers, not repetition.
• Slow Site Speed — A slow site hurts rankings and drives visitors away.
• Poor Mobile Experience — Mobile-first indexing makes this non-negotiable.
• Missing Alt Text — Every image is an SEO opportunity.

Why Infinitus Beats WordPress

Many of these issues trace back to your content management system (CMS). For example: WordPress often relies on bloated plugins and messy code that undermine SEO. Our custom CMS—Infinitus—was built differently:

• Streamlined, plugin-free code
• Built-in SEO controls for metadata, internal linking, and alt text
• Fast performance and mobile optimization by default

Result: fewer mistakes, better indexing, stronger rankings.

We've written about issues with the WordPress, including a 5-part series starting with this: The WordPress Problem: Why the World’s Most Popular CMS Isn’t Always the Best Choice.

Small Fixes, Big Results

Most SEO problems are easy to fix once you know where to look. Want a second set of eyes—or a CMS that’s already built for SEO? Let’s talk.