Portability refers to the ability of something to be easily moved or transferred from one place to another. For example, if you have a portable phone charger, it means that you can easily take it with you wherever you go and use it to charge your phone.
In the context of computers and software, portability refers to the ability of an application or a piece of software to be used on different devices or operating systems. For example, if you have an application that you use on your phone, but you also want to use it on your laptop, you would want the application to be portable so you can easily install and use it on both devices.
Portability is important because it allows us to use the same things on different devices or platforms, without having to worry about compatibility issues. It also makes it easier for developers to create applications that can be used by a wide range of users, regardless of what type of device they are using.
So, portability is the ability of something to be easily moved or transferred from one place to another, especially when it comes to computers and software.