ERDDAP has an email/URL subscription system so that you can be notified immediately whenever
a dataset changes (for example, whenever new data is added to a near-real-time dataset).The system can send you an email or contact a URL that you specify.
See also this comparison
with ERDDAP's RSS subscription service.
Don't abuse this system by entering someone else's email address or a fake email address!
If you do, you may be blocked from using ERDDAP.