In simple terms your website is your opportunity to speak directly to your customers and protential customers. If you are up and running, then you have already spend loads of time picking the right style, the look and feel, that suits your brand or your objectives. So the initial impact should be set, now you need to sell visitors on your ideas, your product etc. You need to convince them that you have something interested to offer or say that will make them stay on your website and buy in to what you do..
Online peole have tons of options and tons of information on any product or service. Once they land on your website they are giving you a chance to impress them. Here are some tips for planning good quality content:
Don't have content just for the sake of it or just to boost your word count for google. It's obvious and boring. Noone will be interested.