Chrome notifications seem like a good idea until a lot sites started to support them and now you’ll get the pop-up notification every single time you open a new site that supports it. You can block these individually but that would be a time-consuming task. To completely shut this feature off, you just need to head to this link and flip the toggle from “Ask before sending” to “Blocked.” For those on Android, you just need to head to Settings in Chrome and head to Advanced and then locate Site Settings. From there tap on Notifications and you’ll see the toggle “Ask before sending” and flip that again to “Blocked.”
Source: Android Police