Free guides
SEO, GEO, AI agents and social media guides
In-depth guides to learn SEO, GEO, AI agents and social media, each built from primary sources.
- SEO
Nofollow vs dofollow links: every type of link, explained
Nofollow, dofollow, sponsored, UGC: what each link type and rel attribute really does in 2026, what Google says, what experiments show, the penalties, and how one site applies it.
- Year nofollow was born
- 2005
- Pages with a nofollow link
- 32.3%
- Pages using sponsored or ugc
- 0.5%
Updated October 1, 2026 · 22 min read
- AI agents
What is WebMCP? The guide from a site that runs it
WebMCP explained: how a web page hands tools to the AI agent in your browser, how it differs from MCP, why Safari opposes it, and what we learned shipping 25 tools.
- First proposals
- 2025
- Chrome page loads that register a tool
- 0.8%
- Browser engines on board
- 1 of 3
Updated October 1, 2026 · 25 min read
SEO agency rankings
Where does your agency rank?
Google positions, citations in Google’s AI answers, the website’s technical setup: every criterion is public and verifiable.
See the ranking- SEO agencies listed
- 139
- published rankings
- 4
- criteria measured for each
- 19