Reading a web address
https://example.com/products/42 is a URL for a product page. example.com is the domain, and /products/42 points to that page. The opening https tells the browser to use a secure connection.
A hyperlink can use that URL to take someone to the page when they click its text or image.
DNS (Domain Name System) works like a contacts list: it finds the IP address for the domain so your browser can reach the right server.
The domain is the name people use to find the site; hosting is where the site runs.
When the address changes
DNS answers are saved for a while to avoid repeated lookups. If a site moves to a new IP address, some devices may keep using the old answer until its time to live expires. This wait is often called “DNS propagation.”