The 5 Most Common SEO Mistakes I Found After Auditing 20 Blogs

March 12, 2026 · 10 min read

I spent one day auditing 20 real blogs for SEO. Parenting, lifestyle, fitness, food, travel. People who write because they love it, not because they have a marketing budget.

The patterns were brutal. The same mistakes kept showing up, site after site.

1. Missing or Generic Meta Descriptions (85% of sites)

Either the meta description was completely absent, or auto-generated text like "A lifestyle blog about family and travel."

Why it matters: The meta description is your ad copy in Google search results. No description = Google picks a random snippet. Generic description = nobody clicks.

The fix (2 minutes):

Write it like you're explaining the page to a friend. Be specific. "I compared 7 budget strollers for city living — here's which one survived NYC sidewalks" beats "A parenting blog with product reviews."

2. No Open Graph Tags (70% of sites)

When someone shares your blog post on Facebook, LinkedIn, or WhatsApp, what shows up? Without OG tags, it's a crapshoot — wrong image, truncated title, no description.

Why it matters: Social shares are free traffic. A post with a compelling image and title gets clicked. A post with a broken thumbnail gets scrolled past.

The fix (5 minutes): Add og:title, og:description, og:image, and og:url to every page. Most SEO plugins handle this automatically.

Common gotcha: Two sites had OG images using http:// instead of https://. Many platforms won't load insecure images.

3. Missing or Broken Schema Markup (75% of sites)

Schema markup (JSON-LD) tells Google exactly what your page is — an article, a recipe, a product review. Without it, Google guesses. And Google's guesses aren't great.

What I found:

• Most blogs had zero schema markup
• One SEO agency had their homepage typed as "Article" instead of "Organization"
• One site had a datePublished of "January 1, 0001"
• Another had "admin" as the blog author — killing E-E-A-T signals

The fix (5 minutes): Add BlogPosting JSON-LD to every post with your real name as author. Any modern SEO plugin generates this automatically.

4. Wrong or Missing Twitter Cards (60% of sites)

Most sites either had no Twitter card tags, or used summary when they should have used summary_large_image.

The difference: summary shows a tiny thumbnail. summary_large_image shows a big, eye-catching image. If you have good images, you want the large version.

The fix (2 minutes): Set your default Twitter card type to summary_large_image in your SEO plugin settings.

5. No H1 Tag on the Homepage (55% of sites)

The H1 tag is the main heading. Google uses it as a strong signal for what the page is about. More than half the blogs had no H1 on their homepage — just a logo and content.

The fix (1 minute): Make sure your homepage has exactly one H1 that describes what your site is about. It can be styled however you want — it just needs to exist and be descriptive.

The Bottom Line

The blogs with the worst SEO weren't bad at writing. They were great writers who never touched their HTML. The content was there. The technical basics weren't.

Every fix on this list takes under 10 minutes. Combined, they can meaningfully improve how Google indexes your content and how people engage with it when it's shared.

Want a detailed audit covering content optimization, backlinks, and keyword opportunities? See our SEO audit services starting at $25.