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Google how to parse the meta-tags of HTML pages, I believe that many inexperienced people do not know what to do, so this article summarizes the causes of the problem and solutions, through this article I hope you can solve this problem.

If you can write and maintain accurate meta tags (for example, descriptive titles and information for search robots), Google can crawl, index, and display your site in search results more accurately. Meta tags provide information for a variety of clients, such as browsers and search engines. Keep in mind that each client may parse only the meta tags that are useful to that client, and suddenly

If you can write and maintain accurate meta tags (for example, descriptive titles and information for search robots), Google can crawl, index, and display your site in search results more accurately. Meta tags provide information for a variety of clients, such as browsers and search engines. Keep in mind that each client may parse only the meta tags that are useful to that client and ignore the other meta tags (although they have other uses).

Here is how Google parses the meta-tags for the following HTML pages:

The traditional Swiss cheese hotpot recipe Google uses this mark. Webmasters should pay great attention to its accuracy.

Google uses this tag, and our search results will show it

Google does not use this tag, nor do other major search engines

Optionally, this flag is used by the Google network administrator tool

Optional

This tag provides a short description of the current page. In many cases, this description is displayed in Google search results as a page summary (snippet). For more information, please refer to our blog article "using better meta-descriptions to improve the page summary" and the help Center article "how to change the title and description of a website". Although description meta tags are optional and will not affect your ranking, a good description can produce a better page summary, which in turn can help improve the quality of our search results and the number of visitors to your page.

Page title

Technically, the title tag is not a meta tag, it is often used with the "description" tag. The content of this tag (that is, the title) is generally displayed in the search results (of course, the page title can also be seen when users use a browser to browse the page or view bookmarks). Our blog post "for visitors or for search engines?" In particular, there is more information about the title tag in "make full use of the page title".

These meta tags control how search engines crawl and index pages. The rules specified by the "robots" meta tag apply to all search engines, and the rules specified by the "googlebot" meta tag apply only to Google. Google can understand the following values (when multiple values are specified, separate them with commas):

Noindex: prevent pages from being indexed (see "blocking or deleting pages using meta tags")

Nofollow: don't find and crawl new pages through links to the current page (see also "blocking or deleting pages using meta tags")

Nosnippet: do not display a page summary when displaying the current page in search results (see "preventing page summaries from being displayed or deleted")

Noodp: when generating a title or page summary for this page, do not use text from an open catalog project (aka dmoz.org) (see "how do I change the title and description of a site?")

Noarchive: do not display a "page snapshot" link when displaying this page in search results (see "preventing cached pages from being displayed or deleted")

Unavailable_after: [date]: delete this page from the search results after the specified date and time (see Robot exclusion Protocol: more flexible now)

When you omit this tag or when you specify c, the default rule is "index, follow". "using robots meta tags" has more information about the "robots" meta tags. As an illustration, you can now also specify this information in the header of your page with the "XmurRobots-tags" HTTP header directive. This is particularly useful, especially if you want to fine-tune crawling and indexing non-HTML files such as PDF, images, or other types.

When we realize that the content of a page is not written in a language that the user may want to read, we often provide a link in the search results to automatically translate your page. In general, this gives you the opportunity to provide unique and convincing content to a wider user base. However, under certain circumstances, you may not want your web page to be translated. With this meta tag, you can indicate that you do not want Google to provide a link to translate this page. This meta tag generally does not affect the ranking of the page for any particular language. For more information, see "Google Translation FAQ".

This is a specific meta tag of the Google webmaster tool, which is used on the high-level pages of your site to verify the owner of a site with the webmaster (another way to verify is to upload a HTML file). The "c" that you set for this tag, "how can you verify the site by adding meta tags to the home page of the site?"

This meta tag defines the content type and character set of the page. When using this meta tag, the value of the content attribute must be enclosed in quotation marks; otherwise, the character attribute may be misunderstood. If you decide to use this meta tag, needless to say, you should make sure that your content actually uses the specified character set. Google's Web author Statistics contains some interesting data about the use of this meta tag.

This meta tag directs the user to a new URL after a certain period of time, and sometimes it is used as a simple form of redirection. Not all browsers support this redirection. It can also confuse users. If you need to change the URL of a page displayed in search engine results, we recommend that you use server-side 301redirection. In addition, the W3C's Web content Readability Tips and troubleshooting Guide 2.0 lists it as tags that should be discarded.

(X) HTML and case

Google can read both HTML-style meta-tags and XHTML-style meta-tags (no matter what kind of encoding the web page uses). In addition, the case of meta tags generally doesn't matter-- we think of and as the same. However, the "verify-v1" meta-tag is an exception, which is case-sensitive.

Lastmod and changefreq tags for revisit-after site maps

Occasionally, network administrators unnecessarily include the "revisit-after" tag to speed up the crawling of a search engine. Unfortunately, this meta-tag is ignored most of the time. If you want the search engine to know about your changes to the page, you can submit a sitemap in XML format. In this file, you can specify the last modification date of your site (lastmod) and the frequency of changes to the URL page (changefreq).

After reading the above, have you mastered how Google parses the meta-tags of HTML pages? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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