Challenges are incentives or rewards that let you earn extra money or gain additional benefits when you meet the criteria.
E.g. the "Perkbox Membership" challenge will reward you with a Perkbox membership when you finish at least 1 Run a day for 20 days with 4 Fridays.
All Challenges are located under "Accounts" -> "Challenges". Please make sure you have updated your Runner App to the latest version.

How to check progress?
You can find a summary of the challenges you participated in on the challenge list.

Click the challenge you are interested in, which will bring up the progress details.
How to claim the incentives?
If you have accomplished a challenge, the system will send you a Perkbox membership invitation email. Make sure you activate it and enjoy the discounts and benifits.