1, keyword stack
Keywords abuse, excessive superposition, search engines are very disgusted with this situation, the so-called full is overflow. The keyword density is usually kept at around 5%.
2. Links are irrelevant
Abuse, irrelevance, improper use of links, etc.
3. The content of the website is irrelevant.
The content of the website should remain relevant to the description of the title.
4. The website layout is messy and crowded.
It is wrong to put everything on it and think that the more content there is on the website, the more beautiful the pictures are. We should keep the layout of the website smooth and beautiful, make way for search engines and give users a good aesthetic experience.