The important things that should be done in SEO are as follows:-
1. You have to do on-page SEO.
2. You have to do a website and competitive analysis.
3. You should always optimize the page for main Keywords
4. You have to do the regular analysis of ranking and traffic.
5. You have to do daily off-page promotion and SEO Reporting.
6. You have to submit the site to the search engine
7. You have to do content optimization on your website.
8. You have to create quality backlinks on your website.