One of the cool features that Android and IOS have developed are application stores. Application trust is vital. When you download a program from those apps stores, you are getting something trusted, stable and frequently upgraded.
Something also integrated this same concept. Linux is another system that delivers a system that allows you to download and install programs that are designed to work with that system. There is no guessing if the program is safe to install. If it is not available in Linux's app store, don't pay it too much attention it. Install only if vitally needed.
Ubuntu created a very user friendly app store for downloads, "Ubuntu Software Center". Before you Google, check the products in your local store first.