Price-drop alerts stay off until you switch them on. Go to Settings > Notifications and turn on Price drop alerts. That same page is where you manage the other emails Wishpicks sends.
Steps
Open Settings > Notifications.
Turn on Price drop alerts. Nothing gets tracked and no emails go out until you do.
Add or open a wish and start tracking it. Free tracking works on partner stores; with Plus you can track any store. See "What is Wishpicks Plus, and what do you get?"
What each toggle does
Price drop alerts starts off. It's the real on/off switch for drop emails: turn it off, confirm when asked, and they stop.
Weekly price recap is the weekly savings summary. It comes with Plus and is on by default there. On the free plan it sits behind an upgrade.
Gift reservations covers emails about reservation activity, and Event reminders covers the reminders tied to a wishlist's event date or its creation anniversary. Both are on by default, and turning either one off stops those emails.
Product news is the occasional product update. In many regions it starts off.
Good to know
Every optional email carries an Unsubscribe link at the bottom, so you can opt out from your inbox instead of digging through settings.
Some emails keep coming whatever you do. A payment-failed notice or a sign-in link is about your account rather than marketing, so there's no switch for those.
Related
"How do price-drop alerts work, and how often are prices checked?"
"How do I set a target price or change when I get a price-drop alert?"