Skype is a VoIP service that allows people to make and receive free voice and video calls over the Internet using a computer, web browser, or mobile phone. VoIP (Voice over Internet Protocol) enables communication using standard landline and mobile phone methods.
How to Use Skype – Beginner's Guide
Whether you’re working from home or looking for a way to chat with others over video, Skype has broken down traditional communication barriers. In addition to chatting with people in your in-app contacts, you can also use it to make international calls. If the person you’re talking to also uses a Skype account, it won’t cost you anything extra to talk to them. However, for an additional fee, you can call and text your non-Skype contacts on their mobile phones.
Skype debuted in 2003 in the early days of VoIP. Ownership changed hands a few times before Microsoft acquired it in 2011.
Skype is no longer the most popular VoIP because communication has gone mobile. Other apps like WhatsApp and Viber are more successful on mobile devices than Skype.