diff --git a/README.md b/README.md
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@@ -1,3 +1,6 @@
 # libnxz
 
-The libnxz package
+[libnxz](https://github.com/libnxz/power-gzip) is a zlib-compatible library
+that uses the NX GZIP Engine available on POWER9 or newer processors in order
+to provide a faster zlib/gzip compression without using the general-purpose
+cores.