Some things on GeoHazardWatch wait for someone to say yes before they happen: for example, a new owner asking to be added through a public form, or an owner adding or removing another owner. Each of these is a request, and the people who may decide it see it on the Reviews page.
Each request names the permission needed to decide it. You see a request only when you hold that permission. If you hold none of them, the page says nothing is waiting for you.
When a request is made, everyone who may decide it gets a notification. One decision is enough: once someone approves or rejects it, it leaves everyone's list.
Sometimes the work behind a request cannot be done at that moment, for example because email is not working. The request then stays on the list, marked with what went wrong and when. Nothing was carried out. Once the problem is fixed, approve it again.
The page says so when this site does not keep requests. An administrator can see why on the admin dashboard.