This really straightforward segment includes every user who has visited your site. We really recommend having a segment of 'everyone' who visits your site, as it is very useful in Permutive Analytics for understanding the behaviour of your entire audience.
Project Has a Pageview Event
For most projects, every user has had a pageview_event. To build the segment of everyone, include users if they've had a pageview event:
Project Has Multiple Types of Pageview Event
Some projects are set up so that not every user has a pageview_event. For example, you may have separate events for home pages and article pages. To build the segment of everyone, include users if they've had any of the pageview event types: