The document defines several key Web 2.0 and social media concepts: Web 2.0 allows for easier connection and content sharing between people through collective contribution across many devices; user-generated content includes any media like posts, tweets, blogs created by online users; a prosumer both consumes and produces media like watching and uploading videos on YouTube; gatekeeping filters information for different forms of communication like relevance in news reports; crowd-sourcing sources ideas from online communities rather than employees like feedback on Starbucks; and crowd-funding raises small amounts of money from individuals online to finance new businesses like a art institute through social media.