Mobile devices are increasingly how people access the internet, with over 95% of new phones having web browsers and 228 million mobile phone users over 13 in the US. Location-based social media services like Foursquare allow users to "check-in" to locations in real-time, sharing their location on platforms such as Foursquare, Facebook Places, and Yelp business pages. The document emphasizes the growing importance of mobile accessibility and location-based sharing through social media.