Because this salad is mayonnaise-based, always keep it refrigerated until serving, and avoid letting it sit at room temperature for more than 2 hours (or 1 hour if it’s above 90°F/32°C).
Use clean utensils when serving to prevent cross-contamination, and store leftovers promptly in a tightly sealed container in the coldest part of your refrigerator. If the salad ever looks or smells off, or if it has been left out too long, discard it rather than risk foodborne illness.