I am new to trading.Please suggest me some good marketplace for trading.
The title looks misleading,maybe it needs to be
Want help in trading instead of
Want to help all for trading.

Anyway first you need to be good at the basics before start the crypto trading and also need to have backup plans if anything goes wrong.As far as now Binance looks better to start with because it has good support and use friendly interface.But the platform need to be picked based on your coin.
Platform is important indeed but not as important as the knowledge for becoming successful in the field of trading. My suggestion to a newbie would be something like, focus on all the top coins and read their statistics of the past year. Try to learn the behavior and follow crypto experts for predicting the next pump or dump. Binance is no use if a person has no trading skills.