diff --git a/README.md b/README.md
index 4978f85f..d5b0b572 100644
--- a/README.md
+++ b/README.md
@@ -302,7 +302,11 @@ Lite version (online domains only):
 
 ## Issues
 
-The default [URL-based](#url-based) blocklist does include **offline** links and may have false positive. Report any false positive by creating an [issue](https://gitlab.com/curben/urlhaus-filter/issues) or [merge request](https://gitlab.com/curben/urlhaus-filter/merge_requests).
+This blocklist operates by blocking the **whole** website, instead of specific webpages; exceptions are made on popular websites (e.g. `https://docs.google.com/`), in which webpages are specified instead (e.g. `https://docs.google.com/malware-page`). Malicious webpages are only listed in the [URL-based](#url-based) filter, popular websites are excluded from other filters.
+
+*Popular* websites are as listed in the [Umbrella Popularity List](https://s3-us-west-1.amazonaws.com/umbrella-static/index.html) (top 1M domains + subdomains), [Tranco List](https://tranco-list.eu/) (top 1M domains) and this [custom list](src/exclude.txt).
+
+If you wish to exclude certain website(s) that you believe is sufficiently well-known, please create an [issue](https://gitlab.com/curben/urlhaus-filter/issues) or [merge request](https://gitlab.com/curben/urlhaus-filter/merge_requests).
 
 This filter **only** accepts new malware URLs from [URLhaus](https://urlhaus.abuse.ch/).