Kite runs your Discord bot on its servers 24/7, for free. You build the bot in Kite's editor and add your bot token. You don't need a VPS or a computer that stays on.
No. Kite only runs bots that are built in Kite. If your bot is written in JavaScript or Python, you need a server or a hosting service that runs your code. If your bot mostly responds to commands and events, building it again in Kite is often faster than keeping a server running.
Yes. Every bot gets free 24/7 hosting with 10,000 credits per month. Premium plans give you more credits and higher limits, but you don't need one to keep your bot online.
Yes. Your bot runs on Kite's servers, not on your computer. It stays online when your computer is off.
No. Kite runs bots built with its visual editor. It can't run discord.js, discord.py or other code.
The dashboard shows when your bot will run out of credits at its current rate, and warns you once it has used 80% of them. If it uses all of them, Kite stops it and starts it again by itself when the next month begins, or a few minutes after you upgrade.

Build commands by connecting blocks, or describe them and let AI build them. Kite is free to start and hosts your bot 24/7.