A website is a great medium to explain to potential customers who you are, why your company is special, how skillful and qualified you are and why they should place their business and pay their money to you.
We can make you look good with the right words and images. If you are good at your job, it is important to let your customers know this by showing them proof: pictures of your completed work and reviews from satisfied customers.
All of these things need to be current. It is no use showing them customer reviews that are years old.