"Websites promote you 24/7; no employee will do that."
Attract your customers by staying up to date with the latest website design trends. Having an outdated website can have the same effect as not having one at all.
In today's age, people are afraid of being scammed and take precautions to prevent it from happening to them.
Because of that, they will look at the design of your website and decide whether they want to continue or not.
With an up to date website, nobody will need to question the legitimacy of your business.