FORBES - Dec 21 - According to eMarketer, Facebook lost ~2M users under the age of 25 in 2018, and the number of Facebook users keeps dropping. Other social networks such as Twitter and LinkedIn are losing young users as well. The reason is the growing interest in vertical networks. A vertical social network is a specifically targeted social network that connects people with very specific interests, hobbies, and passions. People on vertical networks can receive specific and targeted content on a daily basis and, even connect with people who share the same interests. There is a variety of vertical social networks catering to different individuals, including Behance, StackOverflow, Goodwall and ResearchGate. Behance is an advanced vertical network for creative individuals. It allows artists and designers to showcase their work and discover new art every day. On 2012, Adobe acquired Behance for $150M. StackOverflow provides questions and answers related to code development and the surrounding challenges. Goodwall is a community of 1M students and young professionals who connect to discover opportunities from $1M+ in scholarships to 5M+ jobs and internships. ResearchGate is the platform for scientists and researchers to share research articles.