Backend as a Service (BaaS) is a cloud-based solution to provide the backend processes in the best possible way. With a BaaS, you can connect your web and mobile applications to the pre-written cloud-based services. These can help in connecting applications to backend processes such as cloud storage, authentication, etc.
Also, when I see the possibility to deploy a server on Digital Ocean for $5 a month, I just think that this is a no-brainer option.
However, I tend to believe that Parse is not so popular nowadays, so I'm curious to hear from you if you still using Parse, and what was your experience with it?