# Authority and reach

> The backlink exchange, Reddit Presence, the Rank page and the free tools.

- [The backlink exchange](https://rankbox.xyz/docs/growth/backlink-exchange.md): How the Rankbox backlink exchange works for paid members, from credits and matching to verification, placement statuses, clawbacks and Studio rules.
- [Reddit Presence](https://rankbox.xyz/docs/growth/reddit-presence.md): How Reddit Presence finds the threads your buyers read, drafts a disclosed reply you post yourself, checks it, and tracks the thread afterwards.
- [Rank: market coverage and AI readiness](https://rankbox.xyz/docs/growth/rank.md): What the Rank page shows, where each number comes from, how to act on it, and what it doesn't measure, including AI citations and live rankings.
- [Free SEO and AI search tools](https://rankbox.xyz/docs/growth/free-tools.md): Every free Rankbox tool at /tools, what each one does, which ones use AI, the per-IP limit on AI runs, and how they relate to the paid product.