Interactions here refers to client-integrated elements that a bot can create - giving users a way to interact directly with your application. Currently, interactions can be classified under three categories:
Slash CommandsThey can be accessed via the textbox, and return the values the user submitted with the command.
User/Message CommandsThey are available under Apps in user/message context menus, responding with the resolved user or message on which the action was taken.
Interactions and Bot Users
Interactions are essentially webhooks under the hood (and responding to interactions doesn't require a bot token). Thus, you can have an interaction-only application that can be accessed by users without having a bot user in the guild.
disnake is primarily focused on using the gateway events, you will still require a bot user. You can check out other libraries like
hikari for utilizing this feature.