How to optimize the website layout code specification?

First of all, I would like to say that the optimized version of the website should first comply with W3C standards. Otherwise, it is not a standard marketing website.

1. The basic title of a website, title, keywords, and description are required;

2. The website should use the structure of DIV+css;

3. Try to write a CSS to remove unnecessary CSS code, especially in some CMS systems. In fact, there are a lot of CSS that you don't use and can be removed;

4. The required javascript code can be loaded in a JS

5. Try to use as little javascript code as possible. Baidu does not crawl this stuff, but some of it is necessary and can be added to the back of the page;

6. Try to use the smallest picture on the website, and use less PNG, such as gif for monochrome, and jpg for multi-color and complex color;

7. Flash is seldom used, because Baidu can't capture content;

8. Pages need to be generated statically, which can greatly speed up the number of pages loaded.

9. Try to use this method if you can link text or color the base picture

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