Many people enjoy using flash on webpages. They feel that moving images and movie-like quality make a website seem more flashy, more professional, and cooler. The problem is that when you use flash Google has no idea what that super-cool movie says.
What does this mean for your SEO? Any keywords you use in your flash graphic or header are worthless – it’s like giving part of your website away for nothing in return. If you’re trying to target keywords for organic search, every keyword counts. Google doesn’t know if that section of your website is relevant or high quality. It just sees it as space, because search engine spiders cannot crawl that area.
Even if you think that flash is amazing and high quality, do a survey of your demographic. The odds are they would feel less overwhelmed finding information if there wasn’t a bunch of moving pictures distracting them from your menu or content.
Making sure your website is simple to navigate and easy to read is a far better alternative for both your website visitor as well as the search engine ranking of your website.
Everything you do for your website should be geared toward your visitor and the search engine. When in doubt, definitely default to the needs of your visitor, because even if Google sends oodles of traffic to your website, it won’t matter if your website usability is nil due to a bunch of flash graphics all over your site.
Keeping it simple can not only save your pocketbook, because flash is not inexpensive to contract, it can also help your conversion rates once you do get visitors to your website.