Habitant reacted to modsquare in "Untitled" appears after SEO title edit
Hello! This should be an easy fix.
Go to Design > Logo and Title I believe the first field there is "Site Title" and this is where it is pulling from. I'm guessing you are using Squarespace 7.1? I have a couple of clients using it and there must be a bug where occasionally this field decides to erase itself. Keep an eye on this as you make changes to the site as this will likely happen again.