We've been into this era where social media buttons became an integral tool to express every individual's own opinion. That one's identity in social media became a reliable source for foreign sites to consider when identifying a particular customer. That's why, more and more sites are adding social media buttons for logging in and social sharing to promote their products and the site as a whole. Moreover, it is also becoming a means to target a wider span of customers because a user is more likely to engage in a foreign site if it is recommended by a friend or other closer ones. So thanks to the like, share, tweet, and the recently rising pin it and +1 buttons, users can now express more about the things they desire and preferences they look into and share them with their loved ones, friends and other people while promoting that foreign site at the same time.
