There are several ways to check for changes to a website over time, here are a few examples:
Use a website change monitoring tool: There are several tools available, both paid and free, that can automatically track changes to a website over time. These tools generally work by periodically checking the website for changes and sending notifications when changes are detected. A popular website change monitoring tool is Add Screenshots.
Use a web archiving service: Web archiving services, such as the Wayback Machine, allow you to view previous versions of a website, providing a historical perspective on how it has changed over time.
Use a version control system: Some developers use version control systems like Git to track changes to their website's code over time. This method is more suitable for developers, as it requires you to have access to the website's codebase and to understand how version control systems work.
Use a browser extension: There are browser extensions available, like Webpage Monitor, that can notify you when a website changes, you can configure the frequency of the check, and it will notify you when there are changes.
Take periodic screenshots: You can take periodic screenshots of the website and compare them to see the changes over time.
It's important to keep in mind that some changes to a website may not be immediately visible, such as changes to the website's code or changes that only affect certain user groups. And it's also important to consider the website's terms of service and any legal restrictions that may apply before using any website change monitoring tools.