HTML tags used in SEO
What are the HTML tags important in SEO? How should they be optimized?
Philippe David avatar
Written by Philippe David
Updated over a week ago

Our data on HTML tags for SEO

Certain HTML tags play an important role in SEO and should be optimized. They allow you to structure your content and highlight important parts. They highlight elements that need to stand out to Google’ eyes and to your readers. OnCrawl's crawler records data for these tags.

What HTML tags are used in SEO

The main HTML tags that play a role in SEO are the following:

  • <title>: the page title that is displayed in a browser tab and that can be used as the title of a listing on a search results page.

  • <meta description="">: a description of the page that helps search engines understand the subject of the page and that can be used as the description in a listing on a search results page.

  • <Hn>: heading tags that help create a hierarchical structure of the contents of a page, where n is a number

  • Structured data markup: a machine-readable way of indicating the entities and relationships between objects represented by or discussed on the page, usually expressed using entities.

  • "Social" tags for open graph and twitter cards: These represent the main elements of the page in a way that can be read and formatted by social networks in order to display an image or preview for the page when a link is used on their network.

Where to find our data

In your Crawl Report, you have access to the HTML tags dashboards:

  • SEO tags

  • Structured data

  • Social tags

The SEO tags dashboard, for instance, gives you an in-depth look at the Title, Description and H1 tags across your site, with a focus on:

  • Length: titles and descriptions have historically had an ideal length in characters or pixels.

  • Duplicated tags: duplicate tags can signal thin or duplicated content.

  • Missing tags: missing tags weaken the topic and importance signals your site gives to search engines.

If you click on any specific section of a chart, you will access the Data Explorer with the URLs for that section of the chart. For instance, here we have clicked on duplicated <H1> tags:

SEO HTML tags in cross-analysis

If you merge HTML tag analysis and traffic or rank analysis, you can obtain interesting insights as to whether or not your HTML tag optimization is related to your site's SEO performance.

There is often an observable correlation between HTML tag optimization and organic traffic (see the SEO Impact Report with log file or analytics data):

.... between HTML tag optimization and how often it is visited by googlebots (see the SEO Impact Report with log file data): well as between HTML tag optimization and whether a page is ranked or not (see the Ranking Report with Google Search Console data):

Traditional best practices for HTML tags

Optimizing HTML tags is a standard part of on-page SEO:

  • Make sure your title and descriptions are unique

  • Provide a title and description for every page on your site

  • Only write one, unique H1 per page

  • Insert your main keyword in your H1

  • Avoid writing more than 10 H2

  • Prefer between 2 and 5 H2

For any questions about HTML tags, feel free to drop us a line @Oncrawl_CS

You can also find this article by searching for:
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