SEO is the science to improve your website ranking in search engines to gain traffic from the organic listings.
SEO tactics change rapidly, so your online marketing should keep up with these changes. MOZ points out some SEO practices that you probably are still doing that are no longer effective. Are you guilty of still doing these?
Outdated SEO Practices
Keywords before clicks.
Heavy use of anchor text on internal links.
Pages for every keyword variant.
Directories, paid links, etc.
Multiple microsites, separate domains, or separate domains with the same audience or topic target.
Exact and partial keyword match domain names in general
Using CPC or Adwords' "Competition" to determine the difficulty of ranking in organic or non-paid results