Emojis are icons
The Emoji Picker is where user can find various emojis, from default ones to custom ones. To open the Emoji Picker, the user has to click on the grayed-out emoji. Once the Emoji Picker opens, the user can select their emoji from the list and even filter the emojis by using the buttons at the bottom of the picker. Hold shift and left-click to place multiple emojis. The Emoji Picker will sort custom emojis by server, so they're easy to pick out. If you want to favorite an emoji Alt+Click an emoji, and a category will appear called "FAVORITES" containing every emoji you favorited
You can subscribe to Nitro or Nitro classic to gain the ability to post custom emojis everywhere, and gain access to animated emojis!Custom created server emojis are server specific; while integrated emojis (i.e. Twitch subscription emotes) are available for use globally.
Given a little room to grow, emojis will size up and show a bigger version of themselves! Typing a message with no other characters and just emoji will result in wumboji being shown.
You can have up to 27 wumboji in a message before they get too crowded and size back down.
Users can add and use custom emojis in their messages.
To add a custom emoji, As long as you have manage emoji permissions or are the server owner, you can head over to your server and add up to 50 custom emojis to your personalized stash. Go to the "Server Settings" and use the "Emoji" tab to upload custom emoji that anyone on the server can use!
Without a Nitro subscription, custom emojis can ONLY be used in the server they were uploaded on. If an user tries to enter an emoji from another server, only the emoji text code will appear.
Though there isn't any official resource for finding custom emoji to use in your servers, https://emoji.gg is a popular directory of user-created emojis that users can upload and use in their own servers.
If you've subscribed to a few partnered Twitch streamers who've enabled their own custom emojis from their stream channel, you can sync your Twitch account to Discord and then use their custom emojis in any server you join!