The more information the better. You want your site to look good, but most importantly you want your site to be informative and complete. When you start planning for your web site, you need information. All kinds of information. Don't assume the viewer knows anything about what you have to tell them.
Most businesses already have many kinds of printed articles available within their company.
You can make the information available and give the viewer the choice to learn as little or as much as they choose by links on your main pages. Your objective should be to supply all the information available in one place and that is on YOUR web site. When it looks good, and offers plenty of information you will generate a lot of traffic.