what is uploading,downloading and chat features?

Answer 1

to copy the data web that u want to send on Internet to others or to view by others - uploading

to copy on to your system the content that is available on Internet -downloading

chat features are the features that allows to create rooms for our own style or topic or for our our friends to chat privately, to make a call between computers, to chat, add friends, to hide from people annoying you, to ignore the one who disturb you always and so on....................