What was gamer ranking in MMR? [closed]

I rarely to know what is mmr type of rank in gamers? Its a specific or alter higher top rank or its a newbie modification on some cases?Whois in IDs and ID is same or not?(Specification ICVS)The algorithm also in gaming has changed ``~cd/cc* {#:$PATH/HOME/internal&external/storage/sys/file/.../* }Converted priority assets what in collection of author depth diffrent option types.