What does .mxproject file is used for?

Hi All,

I found several topics with controversial information about what is this file used for?

Like this:

https://community.st.com/t5/stm32cubemx-mcus/what-is-the-mxproject-used-for/m-p/584042

I see in my file several sections 

[PreviousLibFiles]

[PreviousUsedKeilFiles]

[PreviousGenFiles]

I don't see any critical information but not sure should I add it to commit or not?

Thanks