what is the most important things about designing keeep in mind for seo?

[sbsl]

hello webmaster i have come with one question what is the most important things should keeping in mind when designing a website to get good traffic .

[saurabhbehl]

You should keep in mind, website should be with web 2.0 and you should have to check SEO parameters for Like.... Meta tags optimization, Alt tag optimization, title optimization, images optimization , site map creation, robot.txt creation if need, Content/keywords ratio optimization, Heading tags optimization,Keyword prominence, editing theme if needed for optmization as per keywords, footer optmization as per Keywords.