It is not just a small chat button, it is a great power
Can you imagine how powerful a chat window can be? As soon as it becomes visible on your website, people can contact you. Sometimes they instinctively click the chat button simply because it is there and this opens up floodgates of opportunities for you because the more people engage with you, the more customers you can get for your business. Even if people don't immediately turn into paying customers and clients, just the fact that they have contacted you has set in motion a process that will sooner or later turn into business.
All over the Internet shopping cart abandonment rate is almost 60%. This means, if 100 people want to purchase from you, 60 among them are going away empty-handed due to some reason. What is the reason? Without directly asking them, you can make thousands of guesses and one of those guesses might be right. You can avoid having to make those thousands of guesses by having a live chat application on your website. This way, many among those 60% will reach out to you before leaving. If they are facing a problem, if they have a question, if they have suddenly developed an apprehension, they can sort it out by contacting you. Maybe there is some confusion that you can help them get rid of by simply providing answers to their questions.