Anonymizer is a service or program that helps you stay anonymous on the internet. Imagine that an anonymizer is like a mask: when you visit different websites, thanks to this mask, the sites cannot see who you really are. It changes your real IP address to another one, so the sites cannot track where you are from.
So, how does an anonymizer protect your data? When you use the internet, all websites record information about you, such as your location or which sites you visit. Anonymizer hides this information, so the sites cannot accurately say who you are and what you are doing online. This is especially useful if you don't want someone to track your actions or collect data about you.
For example, if you want to access a site that is banned in your country, an anonymizer can show that you are in another country where access is allowed. It's like you are traveling in a virtual world without restrictions. But it is worth remembering that this is not a panacea and there are risks, so it is important to use trusted services.