Title tag in Search engine listings:

Title tag in browser:

Title tag in Source:

Title tag has lots of importance in search engine algorithms and below points can be followed for effective titles
(1) Good title tag should be added with well-researched and optimized keywords
(2) Title should describe page content
(3) Title tag can have 3 to 4 keyword phrases
(4) All page should have unique title, else the page will look duplicate in search engine eyes
(5) Titles should be written for searchers and your visitors
(6) Don't add HTML or java scripts to Titles
(7) No Keyword stuffing in Titles
Below are some examples
X Y Z Company - SEO Company UK - Average practice
X Y Z Company SEO Company UK - Average practice
X Y Z Company: SEO Company UK - Average practice
SEO Company UK - X Y Z Company - Better practice
SEO Company UK, SEO Company, SEO UK, SEO Company in UK - X Y Z Company - Bad practice (Keyword stuffing)
SEO Company UK, SEO Consultant, Search Engine Optimisation UK - X Y Z Company, UK - Good practice
This is all about title tag, have title catchy, short and keyword based
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