> ## Documentation Index > Fetch the complete documentation index at: https://www.plain.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Discussions A **discussion** is a side-conversation about a thread — typically a Slack thread or an email chain where teammates pull in expertise from elsewhere in the company. Discussions show up in the thread timeline so context isn't lost. Discussions are mostly created from within the Plain app, but the API is useful if you want to programmatically loop a specific Slack channel into certain types of threads (for example, automatically open a Slack discussion in `#billing-support` for every thread tagged `Billing`).