supplemental not bad according to matt cutts?

[inpursuit]

i just watched a video online by matt cutts and it seems as though he states that their are 2 indexes

regular and supplemental

it seems pages go into supplemental if they are not fresh or something???

dont understand it as i have about 5 sites

and doing a site:domain.com on them

about 5 pages are the regular index and the rest are marked supplemental

1. how are they getting into supplemental?
2. how do you get them out?
3. is it truly not bad to have them in there?

[Vladimiras]

I believe that the first thing to check is your content - same TITLE tags, same meta keywords/descriptions, duplicate content, same text on different pages.
Getting out of supplemental is quite important in all ways.

[inpursuit]

So your saying if you remove the same text which appearson several pages it might come out?

[webkidsan]

and get inbound links ... you dont have enough sites linking to you thats why its in supplemental