This is the first or index, page of your site.
For a company, you should quickly cover the WHO / WHAT / WHERE of your business.
If using as an individual Web site, then anything goes! Visitors can quickly learn more about you and what your interests are. Keep in mind these interests will be what people will use to determine whether they want to stay at your site or not. So be specific... and don't use just graphics for your first page.
Avoid putting links (going off your site) on this page. After all, you've worked hard to get people here, don't let them get away!