Avast is an antivirus program that shields your computer from malware, viruses threats to your internet, cyber attacks. It is among the most popular, fully-featured anti-virus software programs for Windows, Android devices, and Apple's iOS device. This Antivirus program also includes an Internet Security feature that helps to block malicious websites and other web-based content. The program may block certain websites, regardless of whether they're safe and you don't visit them for any malicious reason.

If you notice that avast is blocking a particular website you can disable the Web Shield Module or add the website to your Exclusion List. If you do this, the virus protection will no longer scan and detect any code that may be on these websites. However, this could put your computer and data at risk, which is why it's recommended to add the website to the whitelist instead.

The main function of avast's is to detect and remove malware, spyware such as phishing, ransomware Trojans, bots, rootkits and worms, as well as other malware. It does this by scrutinizing your computer's code, looking for suspicious behavior, as well as other indicators of infection. If the program detects any of these warning signs, it will notify you and prevent access to files or websites.

Moreover, avast is capable of spotting and analyzing potential threats in real-time by making use of advanced algorithms as well as deep learning technology as well as other methods developed by the company. The program also comes with a knowledge-base, and offers email support to paid users and phone support to free users.