what is "hangout"?and how to use it ?

a question about foreigners'habit in the aspect of talking with strangers These days I add some foreign friends and decided to talk with them on skype.But few friends answered me,I don't why they were on line and neglected the words from me.Do foreigners not like to chat with strangers?Is it my fault because of too much meaningless words that makes them feel boring?It almost remove my enthusiasm for learning English.

How to improve my English? I have been learning English for many years and my English is still poor.