welcome to the community @kashifnisartech, it’s a great place to learn about SEO!
SEO is more than just keywords, Google is looking to make sure your content aligns with the searcher’s intent. You need to be creating high-value content for your target persona, and if you do that, then you’ll start to see your content improve in SERPs.
Getting traffic to your content from other sources can help validate this. You can also work on creating guest content for other sites to generate backlinks to your website (rather than just requesting backlinks).