Groups, channels, bots, stickers, and mini apps: what belongs where?

A community question about organizing Telegram features by actual use case rather than by feature name.

Telegram features are easier to understand when they are sorted by job. A private chat is for direct conversation. A group is for many-to-many discussion. A channel is for publishing to an audience. A bot is for a task or interface. Stickers are expression and culture. Mini apps, wallet features, and Stars add service or payment layers, so they should be judged more carefully than ordinary chat features. That separation prevents common mistakes. A small team may need a group, not a channel. A public announcement feed may need a channel with comments, not a noisy group. A support flow may need a bot, but only if users understand what data the bot receives. Sticker packs are low risk, but bot commands, wallet prompts, and mini app login flows deserve source checks. Question for this hub: what Telegram feature causes the most confusion for new users in English explanations? My vote is the difference between channels and groups, followed by the WebK/WebZ split and the way secret chats do not behave like normal cloud chats.