A well designed and responsive website
Design your website to be user friendly, meaning, making it easy for a person to navigate their way around your site to find answers to questions that they might have about a particular product or service. In order to accomplish this, you may have to redesign your site. If it is not easy for people to find the information they are looking for, they will likely get annoyed and go to another more user friendly website that offers the same products or services, and make purchases on that website instead of yours.
When someone visits your website, the homepage is often the first page they see. If they are not impressed enough with it, they are likely not going to click on any of the other pages on your site. As they say, first impressions are lasting impressions. You only get one chance to make a first impression. Your homepage should be updated regularly, and should immediately grab the attention of those who view it.