The website has been lifestream for most of the business and bloggers for years. Facebook has been up for a decade and a lot of websites and bloggers fill up their space on facebook using the pages and posts. Facebook blocked websites when they are not working with community standards.
However, when a page or the website is blocked, it becomes a nightmare. Your website cannot be used anywhere, inside facebook. We can fully neglect facebook but your content cannot be shared totally over Facebook by other users. It will not only damage your reputation and even your sales.
They have a mechanism to detect that the website reputation can be shared across facebook or when the user clicks on the links and visit the website, the security becomes a concern. When a person from facebook clicks a malicious attacked website, the user can rarely know the defect and gives important information or credit card information, the customer is done.
To protect user privacy and security, facebook usually blocks malicious websites and dangerous websites.
Your website can be blocked in a specified way:
Advertising is one of the popular ways to make revenue for your website. However, you must be aware that most of the advertising agencies on the website are not safe. They puts your website to show ads in the cheap qualification process has multiple backdoors. Some have pop-up ads, and some have even download auxiliary software.
The cons of the ads, as described in the former, can cause malicious attacks on visitors. If that kind of links is shared across the social networks, millions of users can be affected and we have to be aware of that thing, your ads have been blocked or your whole website has been blocked.
More are stated in https://www.facebook.com/help/community/question/?id=1109968119068088
If Facebook blocked your website, you have to unblock by complying the community standards and when you believe your website is wrongfully blocked, you can create a ticket to Facebook team like https://www.facebook.com/help/community/question/?id=10157466074055716.