Content is what makes users to understand what your website is about. It is the foot in the door for them to buy your services.
You might have a sexy, well designed website - but if it will not answer the needs of people who have searched for it, they will bounce right out of it. The most important thing is figuring out and targeting who your crowd is. For example, if you own a software company and most of your clients are business, your site should look and feel like business environment. It should be speaking business language!
Business environment can also be delivered in several ways: Peaceful and fun approach vs. corporate and luxurious one.
Content is the most precious asset of your site. It delivers who you really are and what does your business main features and advantages.
It is not only about delivering the right text to your client, but also choosing the right style and photos which creates the perfect environment (we will talk about style further on). It is part of your branding procedure.
Content is also the most important feature for your marketing, especially SEO (search engine optimization).
Search engines, led by Google, likes web pages which contains a big amount of unique, quality content. It gives signal to google that you are giving an added value for your visitors.