Some tips about the most important on-page element: the title element

The title tag, known by some, a bit incorrect, as the title „meta” tag, is considered one of, if not the most, important on-page element.

Some tips on it:

Generally, it’s OK to use the brand name of the company at the end of it: „title – Brand name”.
I generally advise in using „: ” separator before the brand name. Alternatively, you could use „ | ” or „ – ”.
For the homepage, I would put the brand name at the beginning of the title.
I would advise in writing the brand name not as „Site.com”, but, rather „Site”.
For the length of the title, it’s best to do your own testing, but, generally, a length of 65 characters is completely safe, <= 70 is „good enough”, 70-80 is risky at least, and what’s above 80 characters with spaces will generally be cut of for sure.
I would advise in putting lots of emphasis on writing the homepage title tag, as it tends to be more important than others.
If you have an option, avoid special characters in titles, as they might not look good on Google’s homepage. Test and see for yourself.
It’s not OK to have pages with duplicate titles, they are considered a form of duplicate content. You don’t need 100% different titles, but >90% is a good KPI to aim for.
You can crawl easily your web site and see what is the title of the pages using tools such as Screaming Frog or XENU.
You should focus on establishing a consistency between titles (the so-called „meta” titles) and page titles (generally, created using H1 tags). They can be a bit different, for example the H1 tag doesn’t need the brand name, but, more or less, they should be as similar as possible.