How to evaluate the quality of the link resource

Hey, after learn many posts here, i have a question here.

How to evaluate the quality of the link resource. for example: there are too many elements from SEO tools. like Ahrefs give me URL rank, Domain rank etc, Majesticseo showed TF,CF and so on. Does any one can give me a standard? ps: I have bought ahrefs service, can you give me a standard for ahrefs seo elements or just tell me how to evaluate in use ahrefs service.

I am very sorry, English is not my native language. But I'm really want to learn seo, and everything for help will make me very grateful.

Best standard would be common sense as metrics are too easy to manipulate. Look at the websites where links come from and research their reputation, quality, etc. Just my 2 Cents.

infoasian said:

Best standard would be common sense as metrics are too easy to manipulate. Look at the websites where links come from and research their reputation, quality, etc. Just my 2 Cents.

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your means: if i want build links at aaaa.com, i need to check aaaa.com has what links and where the links come from right?

The only thing I really pay attention to is the TF, and the backlink quality.
When it comes down to it, analyzing the backlink profile will give you the best answer.