I want to provide live chat support service at my website. Explain me how will effect it to my onnline business ?

I want customer chat support software for my website, can have any user who suggest me the best live chat software ?

If anyone uses any live chat software on there real estate website then please share your experience with me.

I need a live chat plugin which also have the features like website monitoring and traffic analyzer.

I want to add live chat feature on my website. So, please suggest me best recommendation, all suggestion are appreciable