--- /dev/null
+# Experimental
+
+Some features and functionality in curl and libcurl are considered
+**EXPERIMENTAL**.
+
+Experimental support in curl means:
+
+1. Experimental features are provided to allow users to try them out and
+ provide feedback on functionality and API etc before they ship and get
+ "carved in stone".
+2. You must enable the feature when invoking configure as otherwise curl will
+ not be built with the feature present.
+3. We strongly advice against using this feature in production.
+4. **We reserve the right to change behavior** of the feature without sticking
+ to our API/ABI rules as we do for regular features, as long as it is marked
+ experimental.
+5. Experimental features are clearly marked so in documentation. Beware.
+
+## Experimental features right now
+
+ - HTTP/3 support and options
+ - alt-svc support and options