What are these "[T:???]" tags on submissions?

[yigitsalar]

There is some people that submit with "tags" like [T:VOL], [T:EAID], [T:ISBN], [T:PD], [T:V], [T:X]. What are those, which tag should I use in which case while submitting and why those tags are used in the first place instead of passing the info without it?

[Lugamo]

Those are site codes. This article on the wiki explains what they mean:

https://wiki.redump.info/index.php?title= … Site_Codes

[yigitsalar]

Those are site codes. This article on the wiki explains what they mean:

https://wiki.redump.info/index.php?title= … Site_Codes

Oh. I thought this page gave information about disc codes, so I never clicked on it. Thanks.