24 steps to improve SEO status

1. Remove Low-Quality Pages
2. Make Sure Google Indexes Only One Version of Your Site
3. Fix Broken Links
4. Check if your site is Mobile Friendly
5. Content Gap Analysis
6. Publish Quality Content
7. Improve Page Speed
8. Analyse your backlinks
9. Avoid duplicate title tags
10. Go after featured snippets
11. Optimize for user intent
12. Install an SSL certificate
13. Check for crawl errors
14. Have a simple site structure
15. Improve your on-page SEO
16. Check for duplicate content
17.  Internal & External Linking
18. Track Your Progress
19. Check your robots.txt file
20. Look for branded searches
21. Check the social reputation of a website
22. Great UX/UI Wins
23. Check if your site is penalized
24. Use an SEO Audit Tool

What is SEO?

Search engine optimization (SEO) is the process of increasing the quality and quantity of website traffic by increasing the visibility of a website or a web page to users of a web search engine. SEO refers to the improvement of unpaid results (known as "natural" or "organic" results) and excludes direct traffic and the purchase of paid placement. Additionally, it may target different kinds of searches, including image search, video search, academic search, news search, and industry-specific vertical search engines. Promoting a site to increase the number of backlinks, or inbound links, is another SEO tactic. By May 2015, mobile search had surpassed desktop search.

As an Internet marketing strategy, SEO considers how search engines work, the computer-programmed algorithms that dictate search engine behavior, what people search for, the actual search terms or keywords typed into search engines, and which search engines are preferred by their targeted audience. SEO is performed because a website will receive more visitors from a search engine when website ranks are higher in the search engine results page (SERP). These visitors can then be converted into customers.

SEO differs from local search engine optimization in that the latter is focused on optimizing a business' online presence so that its web pages will be displayed by search engines when a user enters a local search for its products or services. The former instead is more focused on national or international searches.

source: wikipedia