Operator function clarification needed - Mailing list pgsql-docs

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/12/gin-builtin-opclasses.html
Description:

https://www.postgresql.org/docs/12/gin-builtin-opclasses.html

It is unclear what the operators do. Page should link to relevant section(s)
of documentation defining operators.