server 99 merge

I was told in world chat that server99 and a few others were going to merge. What does that mean, when is it, and how is it important to me as a person in server99?

There will be a system letter a few days before a merge giving details of what to expect and things to do.

What's your name in s99? Is like to talk to you sometime.

Im in 119 really really hope to see merge soon would make a nice Christmas present