Websites should not have splash pages, or flash intro pages. Splash pages are start pages that usually have very little text and/or a flash movie on them. They usually have an image, or text that says something along the lines: “Click here to Enterâ€. These pages have little value for the Search Engines and some Search Engines explicitly say that they do not want to index splash pages, as they offer no value to search results. Please avoid putting splash pages on your website.
While Google® can index flash websites, in general flash websites do not lend themselves to good Search Engine rankings and should be avoided for that reason. While they may look nice, they are not generally Search Engine friendly.