Google Chrome have notification feature allowing websites to pop-up notifications in the bottom screen . To clean all those settings :
1.On your computer, open Chrome. 2.At the top right, click More Settings. 3.At the bottom, click Advanced. 4.Under "Privacy and security," click Site settings. 5.Click Notifications. Choose to block or allow notifications: Block all: Turn off Ask before sending. You can just delete those entries as well
Or just paste this in the address bar :
chrome://settings/content/notifications
Good Luck