[Feature request]: Add instructions/information on what to test

[xplosionmind]

Description

In order to provide a reliable and accurate rating to all apps, it would be very useful if information about the most common issues causing a worse app usage experience because of the absence of Google and/or microG.

Additional context

For example (I am making things up):

Common issues that arise in deGoogled phones:

• notifications not working
• limited background usage
• increased battery usage
• …

Terms

• [X] This is not a duplicate of another feature request.