Discord
Your profile banner is not your server's banner. It is 680x240, it lives in User Settings, and animating it needs Nitro rather than boosts.
For Discord · 680×240
Shown at the real ratio with the Rain Alley Anime design. Hover to animate. Previews are watermarked.
The profile banner is the strip across the top of the card that pops up when somebody clicks your name. It belongs to you, not to a server, and it is set under User Settings, Profiles. People confuse it with the server banner constantly, which is understandable given they are both called banners and neither is where you would look for it.
Discord stores it at 680x240 and renders the card narrow, with your avatar overlapping the lower left corner as a circle. That overlap is the whole layout constraint: the bottom left quarter is effectively unusable. The 680x240 in a pack pushes the lockup to the right of centre and keeps the invite on the upper right, so the avatar lands on background.
Animation requires Nitro. Not boosts, not a server tier, Nitro on the account whose profile it is. This is the single most common mix-up in Discord branding, because the server banner rules are about boost levels and the profile banner rules are about subscriptions. If you do not have Nitro, the still PNG is the one you upload and it looks exactly like the first frame of the animation.
For a server owner this format is worth more than it looks. Your profile card is what people see when they click your name in a ticket, in an announcement or in a support thread, and a card that carries the same branding as the server quietly signals that you are the person who runs it.
The avatar covers the lower left, so the quieter scenes that carry their interest in the upper right work best.
Rain Alley rendered as anime artwork, with live motion, drifting particles and a chromed wordmark. Every format in the catalogue, still and animated.
Rain Alley rendered as grunge artwork, with live motion, drifting particles and a chromed wordmark. Every format in the catalogue, still and animated.
Rain Alley rendered as painted artwork, with live motion, drifting particles and a chromed wordmark. Every format in the catalogue, still and animated.
Rain Alley rendered as photoreal artwork, with live motion, drifting particles and a chromed wordmark. Every format in the catalogue, still and animated.
Wet Asphalt rendered as anime artwork, with live motion, drifting particles and a chromed wordmark. Every format in the catalogue, still and animated.
Wet Asphalt rendered as grunge artwork, with live motion, drifting particles and a chromed wordmark. Every format in the catalogue, still and animated.