“…A total of 32 papers were reviewed, extracting 18 SA. Each attribute is presented in Figure 2 alongside the reviewed papers that refer to the respective attribute of SI: Users tend to maintain profiles in different applications, such as Facebook, Twitter, and YouTube; sometimes, they choose to link them with other SM applications, such as Instagram, LinkedIn, Pinterest, Tumblr, MySpace, Grindr, Tinder, Snapchat, Flickr, or CouchSurfing [18,65], or with Skype, online shopping or banking, their eBay account, or potential online doctors' appointments [35]. Users establish connections among different SA of their digital identity as they update their profile information while posting and commenting online [40].…”