META tag can be divided into two parts: HTTP-EQUIV and NAME variables. There is a content in the HTML code example:

7. Forcing the page to be displayed as an independent page in the current window can prevent your own webpage from being called as a frame page by others;

8. and settings to enter And special effects when leaving the page, this function is the format/web page transition in FrontPage, but the added page cannot be a frame page.

HTTP-EQUIV is used to provide some instructions to the browser so that it can react according to these instructions. HTTP-EQUIV actually does not only describe the character encoding of the web page. Commonly used HTTP-EQUIV types also include: web page expiration time, default script language, default style page language, web page automatic refresh time, etc. The description code in the HTML code example is:

The content=webpage description in description is an introduction to the overview of a webpage. This information may appear in the search results, so it needs to be based on Design based on the actual situation of the web page, and try to avoid "descriptions" that are irrelevant to the content of the web page. In addition, it is best to have its own corresponding description for each web page (at least web pages in the same column have corresponding descriptions), rather than the entire website. All use the same description content, because a website has multiple web pages, and the content of each web page must be different. If the same description is used, there will obviously be some web pages that are not directly related to the content. This will not only be detrimental to search engines’ understanding of the web pages. Ranking is also not conducive to users judging whether to click to enter the website to obtain further information based on the information in the search results.