Checkpoints - Limit <title> tags to  characters or less
This is important for SEO for the reason that when you search for something on a search engine for example Google the first 60 characters are listed and anything else will be listed as "……". In addition to that longer titles will be truncated in search engine results.
Google typically displays the first 50-60 characters of a title tag. If you keep your titles under 60 characters, research suggests that you can expect about 90% of your titles to display properly. There's no exact character limit, because characters can vary in width and Google's display titles max out (currently) at 600 pixels. Title tags are a major factor in helping search engines understand what your page is about, and they are the first impression many people have of your page. Title tags are used in three key places: (1) search engine results pages (SERPs), (2) web browsers, and (3) social networks.
If your title is too long, search engines may cut it off—adding an ellipsis ("...") and could end up not displaying important words. While we generally recommend keeping your titles under 60 characters long, the exact limit is a bit more complicated and is based on a 600-pixel container.
Some characters naturally take up more space. A character like uppercase 'W' is wider than a lowercase character like 'i' or 't'.
SEO (Anything beyond about 60 characters may not be displayed in search engine results, reducing click-through rate (CTR) to your site.)
This checkpoint checks the title tags and makes sure that the content inside the tag does not exceed 60 characters in length.