How do you monitor a web page for changes?

[ryanthompson]

So far, I've been using Google Alerts and Google Analytics plus one browser extension but I want to improve and automate this process. I want to actively monitor my website's performance across different browsers and devices to prevent potential issues. And to make sure we're staying compliant with laws/regulations. Also, I want to explore beyond just monitoring my own website and start tracking my competitors' online presence. I want to keep an eye on their design changes and content updates and get insights for adjusting my own marketing strategies. Any tips or resources would be greatly appreciated. *There are around 20 websites at the moment that I want to examine/monitor so I would prefer an automated solution that also allows me to keep an archive.

You?re already past what Google Alerts can realistically handle.
For cross-browser/device issues, synthetic monitoring tools help a lot, and for competitors I?ve found visual diff tools way more insightful than keyword alerts.