I want to be educated!!

[akira]

I see and hear phrases like "bootleg" or "R1-rip" or even "import" when it concerns dvds and I was wondering what it all means (although I do have a fairly good idea...not a total moron,lol) especially when it concerns anime. What should I know and how does any of this information affect any purchases I may wish to make and what should I look for when buying anime dvd??
Any help would be appreciated!!
Thanks!