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This article introduces the relevant knowledge of "what is the meaning of the semantics of HTML structure". Many people will encounter such a dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

What will be the effect of the document after semantics?

When the page is removed or the style is lost, it gives the page a clear structure:

Html itself does not show, we see, for example, bold, font size 2em, bold Is bold, do not think that this is the performance of html, in fact, html default css style in play, so removed or lost style can make the page show a clear structure is not the advantage of semantic HTML structure, but browsers have default style, default style is also designed to better express the semantics of html, it can be said that the browser default style and semantic HTML structure are inseparable.

Screen readers (if visitors are visually impaired) will "read" your web page entirely according to your tags. For example, if you use semantic tags, the screen reader will "spell" your word one by one, rather than trying to pronounce it completely.

Devices such as PDA and mobile phones may not be able to render web pages like browsers on ordinary computers (usually because of their weak support for CSS).

The use of semantic tags ensures that these devices render web pages in a meaningful way. Ideally, the task of the viewing device is to render the web page in accordance with the conditions of the device itself.

Semantic tagging provides the relevant information needed for the device, eliminating the need to consider all possible displays (including existing or future new devices). For example, a mobile phone can choose to display a paragraph of text marked with a title in bold. PDAs may be displayed in larger fonts. Either way, once you mark the text as a title, you can be sure that the reading device will display the page appropriately according to its own conditions.

Search engine crawlers also rely on tags to determine the weight of context and keywords.

In the past, you may not have considered that search engine crawlers are also visitors to the site, but now they are actually extremely valuable users. Without them, search engines will not be able to index your site, and then it will be difficult for ordinary users to visit. It is important that your page is easy for the crawler to understand, because the crawler largely ignores the tags used for presentation and focuses only on semantic tags.

Therefore, if the title of the page file is marked, otherwise, the page may be lower in the search results. In addition to improving ease of use, semantic markup facilitates the correct use of CSS and JavaScript because it itself provides many "hooks" to apply the style and behavior of the page.

At the same time, SEO mainly depends on the structure of your site to define content and external links.

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