A multi-tenanted-platform means that the same set of servers can be used to host multiple customers or multiple customers projects, each on it’s own virtual server.
Sharing physical servers like this means that the load on them can be balanced, by sophisticaed software, allowing for optimal utilisation, without affecting each project’s performance.
So gone are the days when you have to buy an over-specified server just in case you get an unexpected peak load, only to find that 99% of the time you only use 20% of the server’s performance. Let us handle that problem.
…and because we run our severs as efficiently as possible, we see economies of scale, and hence can give you lower, volume pricing. You end up paying for what you use, not “spare capacity”.