Avast Web Shield is constantly testing the movement of data on the internet and stops any possible threats in real-time. This helps protect you from ransomware that blocks your files and requires payment to unlock them. It also protects you from Trojans that claim to be legitimate software, but actually infect your device with malware. Web shield can identify phishing sites which attempt to steal your personal information.
Avira provides a variety of settings that you can configure to customize how avast web shield works. You can, for example, change the sensitivity setting that controls the intensity of how avast web shield scans data when you connect to internet. You can also turn off or on HTTPS scanning scan, script scanning, and block botnet attacks. You can also create an exclusion list in order to avoid certain programs from being detected by web shield.
If avast finds malware or a potentially unwanted program on your computer, it will try to repair the file first. If it cannot be repaired it his explanation will be moved by avast to file to Quarantine and will notify the user of its detection. You can also choose a default action for avast to take if the virus is detected.
You can add a site or application that you are sure is secure to the exceptions list so it will not be blocked again. This can be done by clicking on the Real-Time Shields tab, and then selecting either the Web Shield (or File Shield) item from the list. The Avast Security app and Avast One app have distinct methods of adding apps or websites to the exceptions lists.