My communications skills are not good; please suggest me to improve this?

There are 10 basic points which will help you to improve your communication skill:
1.  Listen, listen, and listen
2.  Who you are talking to matters
3.  Body language matters
4.  Check your content before you speak
5.  Be brief, yet specific
6. Treat everyone equally
7. Maintain a positive attitude and smile

The main thing your practice to speak and read. Spoken practice will help you to pronounce words correct and fast and reading will increase the conent of words and new techniques to put your point effectively in discussions.

Good luck!!!