#1
Im getting fairly good at reading tabs now, i know what almost everything means, but these things still confuse me.

1) Sometimes there are chord names above tabs, like this-

Bm Gmaj7 Bm
e|-------------------------------------------|
B|-------------------------------------------|
G|---------------------------------------0---|
D|---4---0-----4---0-----4---0-----4---0-----|
A|-2---2---------------2---2-----------------|
E|-----------3---3---------------3---3-------|


What does that mean?

2) Where do you slide from when it shows this? Anywhere? Or am I missing something?

D|--------/4----------

3)What do I do when I see this?

----4b6r4-----

Does it mean I pluck 4th, bend it until it sounds like 6th, tehn release it back to 4th? When I realease it, do I completely let go, or just bend it back down quickly?
#2
1) It means your playing notes that come out of those chords

2) you slide up from anywhere you like, but preferably a note off the scale, obviously.

3) yes you bend to 6 then release, how quick or slow you release it will be determined by the song your playing, listen to it and you'll know

hope that helps
#3
The first one really confused me at first too. Maton got it right. Those are the chords your fretting hand should be making.