pgAdmin III has some functions included which should help to implement healthy and good performing databases. They are the result of the long experience of the developers worldwide, and the design problems commonly observed.
If pgAdmin III thinks it has a valuable hint for you, it will pop up a guru hint unless you have chosen to suppress that individual hint or all hints (see options). You can bring up the hint by pressing the hint button in the toolbar at any time, if enabled.
This is an example of a guru hint, as it appears when trying to connect to a non-running or misconfigured PostgreSQL server.
If you check ‘do not show this hint again’, the automatic popup of the individual hint will be suppressed in the future, until it is reset in the options. Error messages will still appear, but without the extended information as provided by the hints.