Google uses the HTML title tag unquestionably to identify pages so it can rank them in search engine results.
Official SEO Starter Guide suggests concise, clear, and descriptive titles for all pages.
Evidence suggests that page titles are only a weak ranking factor regarding their strength.
John Mueller, Google’s webmaster, has declared page titles are unimportant for ranking.
“We use the title-tag for ranking purposes, but it is not the most important part of a page.” It’s not worth filling it with keywords in the hope it works that way.
Mueller continues to explain why page titles are important in SEO and are an essential ranking factor.