Some of these terms are; multi-user virtual environments (Kapp and O’Driscoll
2010), avatar-based virtual worlds (Tseng et.al, 2013) and 3D virtual worlds (Kim et.al, 2012). Second Life (SL),
one of the most popular virtual words, was developed by Linden Lab. and launched in 2003 as a free-access
program for its visitors who interact with one another via avatars (Kruk, 2014).