Glossary

Sponsored content, defined

Short answers to the terms publishers and advertisers ask about most.

rel="sponsored"

An HTML link attribute that tells search engines a link is paid or part of an advertising arrangement. Search engines ask for it on paid links.

Paid links, sponsored and nofollow explained →

nofollow

A link attribute, rel="nofollow", that tells search engines not to treat a link as an endorsement. Search engines accept it as an alternative signal for paid links; rel="sponsored" is the more specific one.

rel="ugc"

A link attribute for links inside user-generated content such as comments and forum posts. It is not meant for paid placements, which use rel="sponsored".

Disclosure label

The visible text, such as "Sponsored" or "Paid placement", that tells readers a piece of content or a link was paid for. It sits alongside the rel attribute, which speaks to search engines.

How to disclose sponsored content →

Guest post

Content written for another site by an outside author, normally unpaid. If anything of value is exchanged for a link, it is a paid placement and needs disclosure.

Domain Rating (DR)

A third-party metric from Ahrefs that scores the strength of a site's backlink profile from 0 to 100. It is not a Google metric and does not measure audience quality.

Reading Domain Rating and traffic estimates →

Publisher approval

The step where a publisher signs off the exact content and link before anything goes live. On LynkBack nothing is published without it.

Placement proof

A record that a sponsored placement went live as agreed: the live URL, the visible label and the link attribute, captured with a date. LynkBack keeps checking it for the paid term.

Spend limit

A server-enforced cap on how much an AI agent or account may spend per order, per day or per month, whatever the agent requests.

How agents can buy safely →

AI agent buyer

Software acting for an advertiser that searches inventory, requests quotes and makes offers through an API, within the limits and approvals its owner sets.

The agent API plan →

x402

A payment protocol that lets software pay per request over HTTP. LynkBack plans to accept USDC via x402 for paid API queries only; placements are paid by card and there is no crypto escrow.

See it in practice

Join the LynkBack waitlist for labeled, publisher-approved sponsored placements.