The AI-powered change summaries are a game changer. Instead of staring at raw HTML diffs trying to figure out what actually changed, Site Spy tells you in plain language — "competitor raised their pricing by 15%" or "new job posting added for Senior Engineer." The browser extension makes it dead simple to start monitoring any page in one click, and the tag system keeps everything organized when you're tracking dozens of sites. The check intervals are flexible enough to monitor fast-moving pages every few minutes or slow ones daily without wasting resources.