Heroku is a cloud platform as a service (PaaS) supporting several programming languages, you can build, run, and operate applications entirely in the cloud. I used it as part of an 8-week project and was really impressed with how easy they made it.
The big selling point for me was they just made it easy to set up stuff like HTTPS/SSL endpoints. You can do this yourself, but it takes time and if “time” is money, this platform to me seems to have the right balance in price and value.
Want to know more, I wrote about them here