"Mr. Rate" is a domain name created for a place where you can get anything with regards the topic of "rating".
The name "mrrate" has only six letters and only one syllable. One-syllable names are highly rare and extremely prestigious. One syllable names are used by established brands like Square, Path and Shell.
Mrrate.com is a dot-com domain. Dot com domains are the most sought after domain extension in the world, used by famous websites like youtube.com. When most people think of a website, they think of a dot-com.
This domain was first registered in November 2002. Older domains have an advantage when ranking in search engines.