I have been developing websites since 1997. Back then, about all one had to do to create a successful web presence was to hold the display to under 800 pixels and punch in all the relevant keywords you could think of in the meta-keywords tag.
Androids were Star Trek, sentient beings and SEO meant stuffing the area under the real content of a page with text keywords in the same color as the backround. Google was still an unknown reference.
The playing field has changed. Smartphones and Tablets now represent a significant portion of the people who will be visiting your website. On one of my personal websites, according to Google Analytics, smartphones and tablets represent almost 10% of the visits to that site. Although it is currently in the #1 position for searches made on Natural Gas Leasing, it could begin to drop in relevance if I continue to ignore the requirements for delivering my message to users of new technology.
Our consulting service can pinpoint the issues and strengths of your current website or future project. Just call me at 570.798.0122 or drop me an email.