list challenge - SERP Analysis

https://www.listchallenges.com/

https://challengelist.gd/challenges/

https://en.wikipedia.org/wiki/List_of_Internet_challenges

https://classicalconversationsbooks.com/collections/challenge-i?srsltid=AfmBOooiu580490ce5A99oxXPzxiaTxDIs7qKuFG1HJGMavJubvIwHAe

https://listtolaunch.jennakutcher.com/challenge

https://adamslistchallenges.tumblr.com/

https://www.goodreads.com/list/show/39364.The_Book_List_Challenge

https://www.youtube.com/playlist?list=PLVFE3RsDUvnykdVOpVsaxlVINvHvkRpDi

https://www.facebook.com/listchallenges/

https://med.ufl.edu/alumni-affairs/residents-fellows/