They police the multiverse, removing people they deem shouldn't exist from various timelines through a process called pruning. It sends them to a place called the Void. These people are called variants.

In some cases, the TVA deems that a particular reality itself is dying and they remove the whole thing, sending it to the Void.

[With an amused tone of voice, she adds,]

There's a helicopter with your name on it within the Void, actually.