Page titles, commonly referred to as title tags – concisely describe the information that can be found on each page. This is helpful for all users (and is majorly beneficial for SEO) but can be vital for users with visual impairment. Without these titles, your website can be nearly impossible to navigate or find information on, especially for those who utilize screen readers.
Your website needs to have concise, unique page titles, around 60 characters long, that are appropriately descriptive for the content found on the page. These titles are also commonly what's chosen to appear, by search engines, as the heading for the search result to your web page.
Studies found that in 2019, nearly 15% of all website are missing page titles.
2.4% of Americans are visually impaired and rely on screen readers to navigate the web.
Page titles: Criteria, best practices, examples, and testing.
How to write page titles for web accessibility.