Meaning of researching, verified, questionable, and end of line
Genosis
From what I understand, and I'm sure someone will jump in here if I'm wrong, but when you create new entries on your tree, you are creating new profiles on your site, you can then set that profile status to one of the following:
researching - still researching the profile
verified - the profile has been verified
questionable - the profile is questionable
end of line -the profile is the end of the family line.
Hope this helps!