Mobile, social and search continue to gain significance as a ranking factor when combined. Jim Yu serves up tips on improving rankings on tablets and smartphones based on the trend. He suggests that different conversion metrics, keywords and ranking factors will emerge for tablets. While tablets are used mostly in the home today, that will change as the hardware evolves and more include cellular service similar to smartphones and laptops. Mobile accounts for 13% of all global Internet traffic from more than 1.1 smartphone subscribers on more than 5 billion mobile phone users -- of which about 488 million regularly use Facebook mobile, according to Jim Yu, citing stats from comScore, Marin and other sources. Some 31% of the population used a tablet or ereader in 2012, and tablet shipments should grow to 383.3 million units in 2017, according to Adobe. Read the article here.