The Challenges page is where a player is presented with a full set of what challenges and milestones are available.
There are four categories of challenges to mention.
Daily Challenges – These are challenges that refresh every 24 hours and which typically provide level progression.
Weekly Challenges – These are challenges that refresh every week and which typically provide level progression.

Milestones – These are different. These are challenges where, when one has satisfied the necessary criteria, cosmetic items are unlocked. A small number of these are locked behind a DLC.

Event Challenges – Unlike other kinds of challenges, event challenges are not actually directly visible in the challenges page – actually being available via the Shop page. During the year, seasonal events arise where players get the opportunity to accomplish challenges so as to obtain limited availability cosmetics. Each season repeated brings a fresh set of cosmetics. Other challenges provide level progression or free-to-play in-game currencies.
That covers challenges. ‘Next’ we will be looking at the Animal Pass.