Find your subgraph https://thegraph.com/explorer/subgraph/SUBGRAPHNAME
Do you have a github link in explorer? Is it possible to find a subgraph on GitHub?
Try to discribe in a few words what for this Subgraph is used for
Explain in most detailed words the Readme file.
Valuate the Subgraph manifest
Which events and functions are related to smart contract?
Evaluate the GraphQL Schema in details
Does it look like an ended ready-to-use subgraph?
Useful for others
Can others use it in a best way?
Suggest as much improvements as possible
Are there any subgraphs that has the same function?
Mark it from 1 to 5