A self-contained section names its subject and states its answer inside itself, so it makes sense when retrieved without the rest of the page.
"It also supports this" means nothing to an engine that retrieved only that paragraph. "Reflexa's agent also supports this" does.
Replace every "it" and "this" in a section with the noun and see whether the meaning held.
Checked by Reflexa: Can each section of your page stand on its own? — part of the 23 checks on every page check.
A self-contained section names its subject and states its answer inside itself, so it makes sense when retrieved without the rest of the page.
"It also supports this" means nothing to an engine that retrieved only that paragraph. "Reflexa's agent also supports this" does.
Replace every "it" and "this" in a section with the noun and see whether the meaning held.
The free page check runs the 23 checks on your public pages — the terms on this page, observed on your pages.