Relevant Density Optimizer (RDO) – On-Page SEO Tool
by Constantin Oesterling on WordPress.org
Optimize your content's SEO by highlighting important terms and analyzing their density in your WordPress posts and pages.

RDO sidebar in the Gutenberg editor
Relevant Density Optimizer (RDO) is a powerful SEO tool that helps you optimize the density of important keywords, entities, and phrases in your content. By analyzing and highlighting term usage directly in the Gutenberg editor, RDO provides real-time insights to improve your on-page SEO.
Key Features
- Term Highlighting: Visually identify where your important terms appear in your content
- Density Analysis: Get real-time calculations of your terms’ density in both overall content and headings
- Term Organization: Sort terms alphabetically or by frequency of use
- Filtering Options: Filter to see only unused terms to identify optimization opportunities
- Search Functionality: Quickly find specific terms in your list
- One-Click Copy: Easily copy terms to paste elsewhere in your content
Why Relevant Term Density Matters
Relevant term density is an important aspect of on-page SEO. Too few mentions of key terms may result in poor rankings and indicate “fluff” which reduces overall text relevance.
How It Works
- Add your important terms in the RDO sidebar
- Toggle highlighting to see where terms appear in your content
- Review term density statistics for your overall content and headings
- Optimize your content based on the insights provided
- Save your terms for future editing sessions
Privacy Policy
Relevant Density Optimizer (RDO) does not collect any personal data from users or visitors. The plugin operates entirely within your WordPress installation and does not communicate with external services.
The terms you add and analyze with RDO are stored in your WordPress database as post meta data and are not shared with any third parties.