How to choose website keywords?

Analyze whether the keywords of the website are optimized, and whether the keywords are optimized. As can be seen from the following aspects:

1, deployment and distribution of keywords and their extended long tail words.

2, the size of the website and the degree of competition of this keyword.

3. The distribution of keywords in the website.

4. The labels on all pages of the website, including home page, columns page, list page, content page, topic page, etc., are well written.

5, a single page, whether the use of keywords is reasonable, such as the alt attribute of the picture.

6, keyword selection whether to consider the word segmentation principle of search engine, reasonable screening.

7. How many accurate anchor text links does this keyword have?