If it's like twitch a "raid" is when another streamer is ready to ending stream he send all of his viewers to your stream.

Maybe it means something different on zapstream nostr:nprofile1qqsxua0hju3e0j3jjhs0fjs0h3htnnreh6zm4lw4d0fhsgsv4rhwwnspz4mhxue69uhhyetvv9ujuerpd46hxtnfduhszrnhwden5te0dehhxtnvdakz7qghwaehxw309aex2mrp0yhxummnw3ezucnpdejz73zyaux ?