"Hit the nail on the head" means that words or opinions are straightforward, hit the key point of the problem at once, and are very accurate and in place. Here are a few examples of using "hit the nail on the head" to make sentences:

His comments always hit the nail on the head.

This article hits the nail on the head and points out the disadvantages of current education.

His suggestion is very practical and hits the nail on the head.

The example description is very accurate.

This plan shows our advantages and disadvantages to the point.

Her analysis is very thorough and reveals the essence of the problem to the point.

In the above example, the idiom "hit the nail on the head" is used, which means that the speech or opinion is very accurate and in place, and hits the crux of the problem directly. In real life, we can also use "hit the nail on the head" to describe other related situations, such as accurate speeches and articles, accurate medical diagnosis and so on.