SEO is the back bone of a site's revenue ,traffic ,it completely depends on how well one
SEO has been made to a site,one site's
SEO score should be always more than 80%,So every webmasters should always keep in mind that with developing cost they should spend extra money for
SEO of a site otherwise all his labour will be in vein.Your site will not come to search engine ,you wont egt any good
PR so it will degrade the value of a site.