Most people work very hard to win new business and nothing is too much trouble. You can generate significant sales for a service simply by promising miracles.
After doing that, you have a new client who can hardly wait to see the magic you promised. In short, the client from hell! Meaning you can roll every dice and you still lose!
Even if you do a very good job, you have a disappointed client. Why? Because your client wasn’t expecting a very good job, they were expecting a great job. You promised!
Remember that if you make a client think that you will do better than you can do, they will end up disappointed. Even worse, the client will decide that you misled them, or lied. This will lead to bad publicity for your service and possibly result in existing clients getting wind of these rumours and deciding not to use you any more.
Don’t raise expectations that you cannot meet.