Conversation so far:
How did Lord Voldemort's character begin?
In a 1999 interview, J. K. Rowling said Lord Voldemort was invented as a nemesis for Harry Potter, and she intentionally did not flesh out Voldemort's backstory at first.
Why did J. K. Rowling not flesh out Lord Voldemort's backstory at first?
Harry Potter didn't know he was a wizard so when the most evil wizard tries to curse him and it rebounds, leaving a scar, the evil wizard goes into hiding.
How else is Lord Voldemort's character developed?
In Harry Potter and the Deathly Hallows, a taboo spell is placed upon the name, such that Lord Voldemort or his followers may trace anyone who utters it.

Question: And then what did he do?
Self-contained rewrite: What did Lord Voldemort do after placing a taboo spell upon his own name?