The document reviews key viral video trends and popular advertisements from 2013, focusing on insights and shifts in social media sharing. Notable trends include the rise of short-form content, prankvertising, and real-time marketing, as well as the overall decrease in shares for top videos compared to 2012, despite a rise in total shares across the viral chart. The analysis identifies specific viral triggers that contributed to the success of the year's most shared videos, including emotional impact, humor, and topical relevance.