Character Addons?

Seven193

In my Daz Studio log file, I see these lines whenever I load in the base Genesis 8 Female character:
 

2019-05-06 03:39:49.655 Begin Loading Character Addons...[...etc...]2019-05-06 03:39:50.856 Finished Loading Character Addons

What are Character Addons?
How can I edit or remove any extra character addons that I don't want?
How did they get added there in the first place?