HTML stands for Hypertext Markup Language, and provides the backbone for the biggest websites on the internet.

Learn how to use HTML tags to structure web pages, improve SEO, and create better user experiences.

Markup tags are keywords surrounded by brackets and when used, they create a specific output in the browser window. Hundreds of different markup tags exist, and they all serve different purposes.

Getting Started With Schema Markup for SEO Learn how to use schema markup on your website today using two helpful resources – the Schema.org library and Google's structured data testing tool.

I guess my question has multiple parts: Is there a good way to validate vendor-specific markup (Zope does not seem to provide a way for TAL)? If not, is validation really important?

The search rivals have set up a collaborative project to create a standard for HTML markup tags, which should lead to more relevant search results ...

It learns by predicting all the matching HTML markup tags one by one. When it predicts the next markup tag, it receives the screenshot as well as all the correct markup tags until that point.

Creating Tag: In this step, you need to go to your google tag manager account and create a custom HTML tag to add your schema markup code. You can name this tag such as Schema Markup Tag ...