Facebook users can include a Like button on a web page, which visitors can click to automatically mark the content on Facebook as something they like._________________________
The Twitter Follow button provides a shortcut for a visitor to share a link to the current page with their followers on Twitter._________________________
After a user clicks a Twitter Follow button, future updates for the linked account are displayed in the visitor's Twitter feed._________________________
The HTML iframe element enables developers to embed content from another website while preserving formatting and presentation that may look quite different from the surrounding web page._________________________
The most common way to find images on Instagram is to log into the Instagram app on a desktop device, search, and mark a photo as a favorite._________________________
Twitter was among the first of the social networks to popularize the inclusion of searchable codes known as hash tags that allow users to find posts on a given topic._________________________