cp is part of the coreutils package found on all Linux distributions and is therefore not specific to CentOS.
You can get information about commands by reading their man (for "manual") pages, e.g.
which will tell you what the -v option is for:
-v, --verbose
explain what is being done
Also, please don't say you need a reply quickly. This is a volunteer site and no questions are more important than any other.