What's the one SEO myth you believed for way too long?

I'll start.

I believed that "keyword density" mattered. I spent hours making sure our target keyword appeared exactly 3-4 times per 500 words. I used tools that highlighted which words were "under-optimized." I even re-wrote paragraphs to squeeze in one more mention.

Turns out that hasn't been a real ranking factor for over a decade. Google's RankBrain (2015) and BERT (2019) made keyword density obsolete. These models understand context, synonyms, and user intent. They don't need you to say "best CRM for small business" five times. They know that "top CRM for startups" means the same thing.

What actually matters is topic coverage. Does your page answer the question completely? Do you cover related subtopics that a user would expect to see? Do you use natural language that matches how people actually ask questions?

I stopped tracking keyword density. Started tracking "information gain" — does this page add something the top 10 results don't have? I also started tracking related entities using keyword intelligence platform. If you write about "CRM," you should also mention "contact management," "sales pipeline," "lead tracking," "automation." Those semantic signals tell Google you actually understand the topic.

Traffic improved. Time on page improved. Citations in AI answers improved. And I stopped sounding like a robot.

Other myths I've heard from people:

• "You need to publish every day." No. You need to publish something useful. The algorithm doesn't care about frequency. It cares about quality.

• "Backlinks from any site help." No. Backlinks from irrelevant, low-authority sites do nothing. One link from a relevant industry site is worth 1,000 from spammy directories.

• "Meta keywords matter." They haven't since 2009. Google confirmed this years ago. Stop wasting time on them.

• "Longer content always ranks better." No. A 500-word page that answers the question perfectly can outrank a 5,000-word page that rambles. Length is not a ranking factor. Completeness is.

• "You need to target keywords with high search volume." No. You need to target keywords that match user intent. A keyword with 50 searches per month that converts at 10% is better than a keyword with 10,000 searches that converts at 0.1%.

What the data actually shows:

Google's own research on how users evaluate search results found that people trust content more when it shows "original data, first-hand experience, and deep knowledge of the topic." Keyword density wasn't even mentioned.

The March 2026 Core Update specifically targeted "redundant content" — pages that don't add new information. If you're just rephrasing what's already on page one, you're at risk.

What I'm curious about:

What's a myth you believed that wasted your time? Have you caught yourself optimizing for something that doesn't matter anymore?

Imed Radhouani
Founder & CTO – Rankfender
Evidence-based product development