The document discusses 15 trends from 2011-2012 including the rise of HTML5 and CSS3, parallax scrolling designs, touchscreen-oriented designs, simpler designs with fewer colors, testing different versions to see which performs better, moving from fixed to fluid or elastic layouts, the return of slideshows, optimizing website performance and targeting users based on location, improving customer support, optimizing search and conversion rates on websites, the transformation of RSS, ensuring compatibility across mobile devices.