A lot of people use their inbox as their todo list, but there's a lot of noise in their emails that they have to parse through every time they check their inbox.
Signal currently allows you to edit the emails in your inbox so you can get rid of irrelevant info (or even add info) as you see fit. We're experimenting with auto summarization (check out the website for an example).
The goal is to make the inbox a better to-do list.