This document discusses 7 common mistakes that can negatively impact a WordPress website's SEO performance: 1) Not conducting an SEO audit, 2) Poor crawling issues, 3) Bad website migrations, 4) On-site SEO issues in the Yoast SEO plugin, 5) Slow website speed, 6) Duplicate content problems, and 7) Missing important metrics tracking. The document provides examples and suggestions for avoiding each mistake to help WordPress sites succeed with SEO.