Why You Need To Improve SEO?
You are requested to check and improve SEO when your rank position comes down. Some people complete a few levels but you should complete all levels of SEO to get rank better.
What are the conditions for improving the blog?
Fix the Broken links
Check your internal and external links if they are giving you a 404 status code then fix it with a 200 status code and add a relevant link.
You can keep your all pages with 200 status codes but you can not control external links because you don't have admin access to them.
I agree that there is less chance to be changed in a link if you are linked to trusted and relevant informational articles but still, if the link changed or deleted. You have to find it in your blog and need to fix all broken links.
Broken links are also known as dead links.
Work with the right keyword density
Keep your keyword ratio between 1-2%. This helps you to keep safe your blog from keyword stuffing.
Moreover, you are advised to write first user intent content and add the user's relevant queries in the article.
Read the keyword density post for more knowledge.
Write with an accurate grammar
Accurate grammar makes your blog engaging so your posts can reduce the bounce rate.
You can use Grammarly for this but don't trust blindly. You need to verify the grammar even if you will use Grammarly.
Apart from this, Grammarly helps you to write fast and it checks and corrects your spelling while writing valuable content.
Use synonym words
Similar words help you to never repeat your words again and again. So use relevant similar words to make quality content.
Use a top-to-bottom strategy
Add the main title on the top and then the heading and subheading. This increases the reader's reading time and your post looks good with the right formatting.
Add relevant internal and external links
You can make a blog more informative by adding internal links and external links that help to enhance the knowledge of the reader.
This way you can improve SEO.