What are SEO Mistakes have others do?

[DivyaShravani]

1.Optimizing content around one keyword.
2.Neglecting dated content.
3.Forgetting mobile users.
4.Not optimizing for site speed.
5.Failing to include relevant and helpful internal links.
6.Failing to include relevant and helpful external links.
7.Focusing on quantity over quality.
8.Neglecting broken or redirecting links.