How to complete On-page Optimization ?

Maybe prepare a checklist from here. https://backlinko.com/on-page-seo

Hi, Tuhin
It totally depends on you. Like what do you need or not.

These are few steps which could help you:
1. Website must be mobile device friendly,
2. Images need to be optimized with using relevant alt tags and size of the images to keep the page load speed proper.
3. Identifying accurate keyword for your business
4. Optimizing the content using those keywords, please make sure to focus on keyword density and prominence.
5. Optimizing title, meta tags and header tags.
6. Integrate with google analytics to track audience and search console.
7. Adding Yoast plugin, it would help you optimize content for each page.
8. Adding sitemaps and do remember to crawl them in google search engine.
9. Adding robots.txt to disallow those pages which you don't want to crawl under google index.
10. check for 404 page
11. No broken links should be there in the website

They are few and should help you in optimizing the website on-page in a good way.

Make sure that there are no 4XX errors and broken links. Robots.txt file and sitemap should be present on your website and keep your sitemap indexed. You must also avoid duplicate titles and meta descriptions.

There are a lot of threads already existing on this, it's best to use the search function for this. For starters you can read up on these threads:

- Elements of on-page optimization
- What are the most critical things to be done in the on-page SEO
- Yoast Wordpress SEO Plugin vs All in One SEO Pack vs Platinum SEO Pack

A website audit will tell you on the needs of the website in which kind of OnPage SEO will be use to optimize every page.

you can get on page activities list from google but no one will share their routine work as it is a strategy of particular.

Best Onpage Guide on Internet:-- https://backlinko.com/on-page-seo

I use a site that analyzes the website content www.seocodereview.com
I think it will help you fix your seo.
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Put your keyword in the url, title tag, meta tag, anchor tag in your href link

The Backlinko one others have linked to is very good. We also have one - How To Achieve Perfect On-Page SEO