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 "Multiple Page Titles" Mean"?
These URLs have more than one <title> tag on the page.
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.
However, each page should only have 1 title tag. Otherwise, search engines could get confused on which one to use, or value given to either could be reduced. While it may not be hugely detrimental to the SEO of the site, it's best practice to only use 1 title tag per page.
How to Fix
You can fix this issue by removing extra title tags on each page listed in the table below. If rewriting or combining titles, follow the guidelines below for best practices.
Other Guidelines for Writing Effective Titles
Rewrite the title for each URL using your most important targeted keywords and keeping it under 570 pixels wide. Here are some other best practices for writing good titles:
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 570 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