Lots of times when searching for torrent of movies it has a bunch of these. What are they and how can I use them to my advantage?

You could burn them to a dvd or watch them with a player that supports them.

Those are the file type that you can actually find when browsing the contents of any movie dvd.
If you open a dvd in the explorer, you'll usually find lots of .vob files in varying sizes. The largest one usually is the main movie.

To burn them you might choose the "make movie dvd" option (or anything resembling that) in your burn software and if prompted for the files you put the .vobs in the "VIDEO TS" folder of your dvd layout. Click burn! Done.

you can also rename vob to mpg, same file format.

VLC Media Player will play 'em
http://www.videolan.org/vlc/

I have VLC...I will have to try this. Thanks Brothers in mayhem and dax...