Site SEO optimization diary set the target keyword

First, how to determine the key words? According to the Baidu index, select a higher search index as a candidate keyword. A keyword search results, if most of the non-home link, the keyword can be in a short period of time through optimization to obtain a good ranking, you can choose such keywords as the target keyword. Second, how to set the target keywords?

1. Set by three tags (title, key, description) in HTML

Title: Using "_" to split the keyword
Key: Use "," to split the keyword
Description: Multiple repetitions by keyword
2, the first page to increase the target keyword density (<=8%)
3, three navigation: main navigation, location navigation, secondary navigation
4. Anchor text inside and outside the station address: http://www.huang3.net/html/Life/2015/0331/6.html

Site SEO optimization diary set the target keyword