What kind of logs are stored in "IIS logs" , "freb logs (failed request tracing rules) and "httperr logs" ?

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C#

ASP.NET

IIS

I know so many articles are there in net, but I want a clear content like:


1. Differences between these 3 kind of logs.
2. which log files store exactly what content/s

Thanks in advance

What I have tried:

searched, but got HUGE explanations.
Kindly brief me about these 3 diff log files and their contents.