Trying to make your WordPress site faster is an already technically complex process, further obscured by all the jargon you have to understand. Here’s an overview of some commonly used site “speed up” terms. I hope it helps demystify the process!
General web terms
The program you open to get on the internet: Chrome, Firefox, Safari are the most common examples.
A special computer, provided by your hosting company, where your website actually lives. By “lives”, I mean where all the files and the database are stored. This machine delivers your website to all your website visitors.
Just like your phone and computer run on a certain software – Windows or MacOS for example – there are a few different types of software your server may run on.
Normally you don’t have to worry too much about this – it’s a decision made by your host and you don’t need to get your hands dirty. But if you get really into optimization, there can be a few differences depending on your server environment.