If bounce rates have spiked, first analyze traffic sources to see if any new, unrelated channels are sending visitors. Irrelevant traffic from low-quality sites often has high bounce rates. Page speed is another key factor, as visitors are likely to bounce if pages take too long to load. Check for broken links as well, since arriving users may quickly leave if they encounter error pages. Implementing these checks can help diagnose sudden increases in bounce rates and provide fixes to retain site visitors longer.