VPN establishes a reliable protection: everything that you send and receive cannot be intercepted and read. It will protect against logging of your activity by internet providers and from intruders who set up a Wi-Fi hotspot in a public place.
Your IP address will change to the address of the country where the server is located. All websites will begin to consider you as a user who is physically located in the selected country.
Also, you will the internet under the same conditions as the locals of that country. For example, without censorship and restrictions of the country you are currently located in.