Spam reviews often contain links to other websites. While Block links and Block email addresses are on, which is the default, Tringify refuses reviews that contain either. Refused reviews are never saved and never send you a notification.
Tighten your settings
Open Reviews and choose Settings.
Under Content filters, check that Block links and Block email addresses are on.
Add words or phrases that keep appearing in spam to Blocked words.
If spam continues, choose Manual moderation or turn on Require purchase. If you allowed guest reviews, turn Allow guest reviews off.
Save your changes.
Manual moderation keeps every new review off your store until you approve it. Require purchase lets only customers whose order for the product counts as a purchase review it; guests with a review invitation from their order can still review that purchase.
Clean up spam that was already posted
Open Reviews and filter by status or star rating to find the spam.
Select the reviews and choose Reject to keep them unpublished, or Delete to remove them permanently.
Check the notification for the result.
Rejected reviews stay in Reviews for your records and never appear on your store. See Configure review settings for every setting and the limits that apply to all stores.