In search engine optimization, the term markup (or markup) includes the opportunity to add additional information for search engines to the data in the source code. Revision marks in standardized markup languages are used to structure the source code and make it easier for search engines to understand how revision marks are processed. Content or source code is usually tagged using tags defined in the authorship markup or markup language. Structured data is important for search engine optimization as it can be used to generate rich snippets.
The markup (in the different markup languages) makes it possible to provide additional information, so that the presentation, structure and format can be regulated or instructions for its subsequent processing can be given to the computers that perform it. A browser such as an application knows how to handle HTML and CSS source code because it can interpret the markup. This requires standards that simply constitute the meta-definitions of markup languages. HTML is based on XML, which in turn is based on the principles of SGML. A markup is always preceded by the definition of the document class, which determines which symbols or labels can be used. This is described with a syntax. XML is also extensible. You can add your own definitions of items and types, as well as communication with scripting languages or other items.
Markup languages can generally be divided into three areas. Descriptive markup languages they determine the properties of the items and their state within a structure. The procedural languagesor define how a document is created, viewed, or processed. PDF or LaTeX are examples of formats. At the same time, there markup languages used in wikis, forums, or blogs. These only contain a limited selection of items. The formatting and structuring alternatives on Wikipedia serve as an example.
When it comes to markup languages or markups, there is always an important standard that the focus is on. Markup and content must be separate - in other words, the presentation of the content is separate from the actual content. Mainly for large websites, the formatting is done using CSS files and the content structure is specified in HTML. The markup can also be valid or invalid with respect to the metalanguage that establishes it. Certain rules must be applied with HTML, CSS, and XML, so that the code can be read by a terminal. Whether a particular document is valid in a markup language can easily be checked using the W3C validator.
Relevance for SEO
Markup is very important in the field of search engine optimization. All areas of a web document can contain certain items that have an impact on behavior from search engines.
Some markups are also useful for users, for example, a text that hovers over a hyperlink and indicates to users where the link leads or a clear structure that was generated by means of individual HTML tags. Markup should be useful and shape the user experience. At the same time, the marking it is important for your web portal to be easy to searchespecially when it comes to preparing data for trackers. You can deny or grant crawlers access to a specific document with revision marks.
With the increasing use of smart search assistants, the importance of markup is on the rise. This is because these wizards can process structured data more easily. For conventional web searches, markup is now essential to show rating stars, prices, or event data in SERP snippets.