What is one of the main uses of threads in Slack?

One of the main uses of threads in Slack is to keep discussions organized. Threads allow users to maintain context within a conversation by allowing them to respond directly to a specific message, rather than starting a new conversation in the main chat space. This is particularly valuable in busy channels where multiple topics might be discussed simultaneously. By using threads, participants can follow discussions related to a specific message without cluttering the main chat, which facilitates focus and clarity. This organizational feature helps teams manage their communications more effectively, ensuring that relevant information is readily accessible and that important conversations do not get lost among other messages.

The other options focus on functionalities that are not directly related to the purpose of threads. For example, creating group calls pertains to communication features outside of thread organization, while creating user surveys and managing workspace applications involve different aspects of Slack's functionalities, unrelated to the conversation structuring that threads provide.