Since this is technically a helping question instead of a space page I will try to be brief. The links are screenshots and some of them have info typed onto them so you see what is going on.
Much of the flexibility of wikitree is due to the ingenuity of Ales Trtnik (I will get the tilde over that S someday). He is the man behind Wikitree+, the suggestions list, unsourced, Data Doctors including the weekly challenge, and a big help to the categorization project. Then there is Chris Whitten the founder of WikiTree and thousands of amateur and professional genealogists.
The Data Doctor challenges always start with a question in G2G such as this one.
https://www.wikitree.com/g2g/629920/challenge-of-the-week-propose-merges-for-duplicate-profiles
From this point you have 2 choices.
http://prntscr.com/jxgqsz go here.
http://prntscr.com/jxgh3u then here.
or go to
http://tinyurl.com/Doctorsheet (you can bookmark that one)
Click a cell on the list or hover over a cell on the spreadsheet and click the link. They both go to the same place.
http://prntscr.com/jxghoo
Current challenge is merging. This is what it will look like after clicking the cell
http://prntscr.com/jxgiyd (instructions in screenshot)
The last thing you do is the status button
http://prntscr.com/jxgkgm (instructions in screenshot.)
This link is only to show details for using the spreadsheet
http://prntscr.com/hk72jy (instructions in screenshot)
Feel free to use the spreadsheet if you like and be sure to check out additional features like the info tab with tips, tricks, weblinks, and space pages to help you find things. Feel free to add your favorites.
There is also a section "Error lists by State/Country" that will take you to suggestion lists by different states, provinces, or countries. But if you want to have them count in the challenge you must make sure to do the SAME suggestion numbers as we have in the current challenge. Any of these containing the word "challenge" or "WikiTree" are NOT updated each week with the new suggestion report.
I hope this helps clarify what we are doing and how we are doing it. Just remember that before you start, check the green area on the profile like here.
http://prntscr.com/jxgwsi to make sure someone didn't already do what YOU are trying to do.
Wiki ON people.