> For the complete documentation index, see [llms.txt](https://docs.arcology.network/arcology-architecture-overview/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.arcology.network/arcology-architecture-overview/pool.md).

# Pool

The pool service keeps a set of transactions waiting to be processed. When a new block starts, the service picks a list of transactions based on a set of selection strategies and send the them to the scheduling service for execution planning.