SEO Copywriting
Search engines love relevance. They live for relevance. Nothing pleases them more than finding the most informative, appropriate and useful website to match a query. The search engine companies spend millions of pounds and working hours in attempting to formulate ways by which the rubbish can be ignored and only the purest, most useful sites returned. It's a noble quest. They work tirelessly to out-tech, head off and second guess the engine manipulators, the spamdexers, the accidentalists, those who would knowingly or otherwise abuse the integrity of search returns by working the system to return unhelpful and irrelevant pages against queries for their own ends.
The search engines are seeking the foremost authority on a given subject. They want the most reputable sites and those that know the most on a particular topic. The most rewarding approach when seeking to legitimately see your site at the top of the heap is not to ask what search engines can do for you, but what you can do for search engines. It's not up to the search engines to make your site relevant. That's the job of the site owner.
The way you do this is in principle, simple enough - through SEO Copywriting and text-related content. Engines can't read images or graphics, they cannot determine the relevance of Flash in relation to a search term. The two most important factors upon which they can determine relevance is on the site text and more importantly the links from authoritative sites inspired by that text.