Webmaster Knows all

Search engine optimization is the practice of tweaking a page so that it is ranked well under target keywords in the organic, or natural, search results (organic results mean not paid placement). It differs from search engine marketing, which is the practice of tweaking Pay-Per-Click campaigns for optimum ROI (return on investment).

In the earliest days of the practice all a webmaster had to do was repeat a keyword on their page over and over again and the page would rank well for that keyword. This was of course easily abused and search engines had very poor relevancy. Then Sergey Brin and Lawrence Page founded Google based off an algorithm that used both on-page and off page factors and the search engine world changed forever. Now every major search engine uses off-page factors that Brin & Page pioneered, so while they are all different, when you're focusing on the fundamentals the changes you make will be beneficial for all search engines.