documenting focus on standard algs

README.md

@@ -36,6 +36,8 @@ More information on OQS can be found [here](https://openquantumsafe.org/) and in
 
 Details on each supported algorithm can be found in the [docs/algorithms](https://github.com/open-quantum-safe/liboqs/tree/main/docs/algorithms) folder.
 
+The list below references all available algorithms. Recommended for further use are the ones either already standardized or in the process of standardization by NIST. To this end, `liboqs` by default is built only with support for "Kyber" (excluding the "-90s" variants), Dilithium (excluding the "aes" variants), Falcon, SPHINCS+ (excluding the "robust" variants). Other, e.g., NIST round 4 or experimental, algorithms can be activated by setting the [OQS_ALGS_ENABLED](CONFIGURE.md#oqs_algs_enabled) build configuration variable to suitable values other than "STD".
+
 #### Key encapsulation mechanisms
 
 <!--- OQS_TEMPLATE_FRAGMENT_LIST_KEXS_START -->