diff --git a/README.md b/README.md
index 0b9dd3f..fd3868e 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,15 @@
 # open-science-catalog-validation
 Validation for [open-science-catalog-metadata](https://github.com/ESA-EarthCODE/open-science-catalog-metadata)
+
+
+## How-to
+
+In order to run the valdation, run the folling steps:
+
+```bash
+npm install
+```
+
+```bash
+npx stac-node-validator --config config.json ../../metadata/{eo-missions,products,projects,themes,variables}
+```
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