Side Missions for The Ascent is a mission category that features a list of various tasks that a player can acquire and complete throughout the entire game. A number of side missions become available through story progression and as you speak to certain NPCs, and accept the job offer. Completing missions grants various rewards such as Weapons, Armor, and more, but most importantly, it yields EXP that is allocated into leveling up the player's character - each level that is acquired grants Skill Points and an increase to various Stats. This page covers a list of all the Missions featured in The Ascent.
Side Missions in The Ascent
Side Missions on the other hand are acquired by speaking to NPCs and accepting the job the is offered, side missions are additional tasks that have no bearing to the main campaign, but it is still important to complete in order to discover secrets and new areas. You can choose which mission you want to track or check the objectives and other related details by opening the Main Menu > Map & Missions.
Journal Tab: Map & Missions
Check all started (and completed) Missions and their status. Set which one to track and keep an eye on the Recommended Level for Side Missions. Get an overview of all areas you have visited and see where to go by using the map.
The Ascent All Side Missions