overwatch
The Play menu.

The Play menu (with the Others category selected).

Playlists are collections of game modes available via the Play menu.

Each game mode in their respective playlist has its own individual queue, but all modes aside from Competitive are cross-play between console and PC.

Available Playlists

Unranked

"Jump into a game against other players of your skill level."

The Unranked playlist contains:

Competitive

The Competitive playlist.

The Competitive playlist.

"Compete against other players and work your way up the ranks."

The Competitive playlist contains:

This playlist also includes the information panels for Competitive Progress, the Top 500 Leaderboard, and the Competitive Tier Legend.

Stadium

“Customize your hero and fight your way up the ranks“

Stadium is a game mode in Overwatch 2, released in Season 16, with the Quick Play mode added at the begging of Season 18.

The Stadium playlist contains:

Arcade

"New game modes! New rules! New maps! Enter the Arcade."

The Arcade playlist contains 7 modes:

Others

"More Game Modes"

The Others playlist contains:

Removed Playlists

The play menu in  showing a Weekly Brawl mode.

The play menu in Overwatch showing a Weekly Brawl mode.

These playlists were previously available via the play menu, but have since been removed from the game and/or replaced.