What is a Title Tag?
The title of your page is perhaps one of the most important content areas of your site for SEO. As its name suggests, this tag includes the title or very brief summary of the content users can expect to find on the page. It's found in the head element of the HTML source.
A typical title tag:
<title>Your Source For Blue Widgets & Green Widgets | Acme Inc.</title>
The title is used in many places, but perhaps the two main areas of importance are the browser's title bar and the anchor text of your page's snippet on the SERP. Search engines give content in this area perhaps the highest weight of any content area on the page, so it's important that this area is optimized well.
What Does "Duplicate Titles" Mean"?
It means one or more other URLs share exactly the same title as this page. The number of duplicates refers to the total number of URLs that share this same titles.
Why It's Important
The title tag is perhaps one of the most important content areas of the page for SEO. A well-written title that accurately describes the page's content includes targeted keywords is crucial for the SEO success of the page.
Using duplicate titles almost guarantees that they will not accurately describe each individual page's content or include the page's targeted keywords since the title was not written specifically for each page.
A duplicate title is perhaps a little better than omitting the title tag entirely, but it is a significant wasted opportunity to help the page rank better.
How to Fix
You can fix this issue by ensuring every title on your site is unique. Rewrite each duplicate so that it is unique and accurately describes the specific content on the page. If your site has a very large number of pages with duplicate titles, consider rewriting titles for the most important pages first or using a CMS or scripts to automatically generate the titles for you.
Other Guidelines for Writing Effective Titles
Write a unique title tag using the page’s targeted keywords. You should do the same for other URLs on the site with this same title tag too. Follow these for best practices when writing a unique title tag:
Each title should be unique. Ideally, no two URLs should share the same title.
Place your most important keywords as early in the title as possible
Keep title length to 600 pixels wide, which is about 50-60 English characters
Keep your brand name or site name towards the end of the title
Titles should be natural and human-readable, not just comma-separated keyword lists
For large sites, consider writing rules to programmatically generate your page titles, but make sure these are human-readable and make sense