Hi @Iqbalh11 and @JohnSmith!
The link that JohnSmith shared is a source of what articles need help. How to do an editorial review gives some instructions for how to use that list. However, for “what’s wrong with it and needs improvement”, you’ll have to use your own judgement to figure that out. While we have the ability to flag an article as needing review, we don’t have a mechanism for the person who flagged it to explain why. Often, it’s just “I just wrote this and I want another pair of eyes to look at it.” – There might be nothing wrong with it at all. You can also refer to the writing style guide for “the way we do things”. We try to keep the number of “rules” to a minimum, since MDN is a wiki with many, many contributors.
If you have more questions, I encourage you to ask them on this forum.