As all search engines are not able to craw land index flash (and the ones that do often do it with error), you should avoid using flash on your website .
Search engines work hard to decipher the content of a page. By using structured data, you will provide search engine explicit clues about the meaning of the content.
Redirects are used to send search engines and users to different URLs from the ones they requested. When you are redirecting one URL to another, you should follow the best redirect Practices to retain SEO value.
