Introduction
What does it do?
The goal of the core extension seo
is to make sure basic technical Search Engine Optimization (SEO) is done right
out of the box. Specific fields for SEO purposes are added, as well as the rendering of HTML meta tags in the frontend.
There are several things you can do to optimize your site for search engines. Some tasks are only solvable with good human writers, others are technical tasks, which need to be implemented.
The goal of the extension seo
is to help you with the following parts of your SEO journey.
- Give editors all the fields needed to set the necessary meta tags
- Provide the rendering of meta tags in the frontend for SEO related information, to avoid reimplementing it again and again
- Provide stable APIs for developers to give them the chance to change the behaviour when needed in edge cases
This manual will not cover all the developer information, as these are covered in the TYPO3 API documentation.
Screenshots

General
Tab in the TYPO3 Backend

SEO
Tab in the TYPO3 Backend

Metadata
Tab in the TYPO3 Backend
Hreflang Tags
hreflang
link-tags are added automatically for multi-language websites based on the one-tree principle. The links are
based on the Site configuration and depend on translations of a page.
hreflang="x-
indicates the link of the current page in the default language.
The value of hreflang
is set for each language in Site Management > Sites (see Adding Languages)
Canonical Tags
TYPO3 provides built-in support for the canonical tag (<link rel="canonical" href="https://
).
If the core extension seo
is installed, it will automatically add the canonical link to the website output.
The canonical link is basically the same absolute link as the link to the current hreflang
base, and is meant
to indicate where the original source of the content is. It is a tool to prevent duplicate content
penalties.
In the page properties (Page > (any Page) > SEO > Canonical link), the canonical link can be overwritten per language, by editing the page of the specific language. The link wizard offers all possibilities including external links and link handler configurations.
If no manual canonical link is entered, TYPO3 will generate a canonicalized URL to the current page in the current language.
Warning
If you have other SEO extensions installed that generate canonical links, you have to make sure only one is responsible to embed into your frontend output. If both core and another extension are generating a canonical link, it will result in 2 canonical links which might cause confusion for search engines.
XML Sitemap
See XML sitemap for the documentation how to configure your XML sitemaps.