I read that the length of the contents in a title tag depends on the character pixel width. What does this mean?
I'm referring to an article that I read on Search Engine Land:
The visible title tag length has changed over time but is currently 70 to 71 characters, up from roughly 50 to 60 depending on the character pixel width.
Does this relate to desktops or mobile devices?
How do you work out pixel width? Is there a set length for different devices?