Content Types
A lot of steamers are using the wrong categories, especially Video Game ones, either on purpose or because they're unaware of the choices they have. When configuring the Stream Info, before selecting a category, add a drop down for "Type of Content". There are three main types on the platform: Video Games, IRL (including IRL games) and Unattended* (check below for explanation). Choosing the category should only be allowed after choosing the type of content, and should be limited to only what pertains to that type (e.g. streamers who do IRL / Unattended content should not be able to pick Video Game categories). This will help both existing and new (especially) streamers choose the proper category for their content and improve discoverability. In addition, selecting a category should become mandatory as there are a multitude of channels streaming under no category and can only be discovered by browsing all channels. Further on, when selecting an IRL / Unattended category, if the streamer types in a keyword that is not part of the category's name, they should be suggested* which category to use for their content.
*My feedback for:
Unattended Streams https://twitch.uservoice.com/forums/310210-discover/suggestions/47434523
Category Suggestions: https://twitch.uservoice.com/forums/310210-discover/suggestions/47434550