diff --git a/dags/sustainability_score/README.md b/dags/sustainability_score/README.md
index 3a60a92..ebd1ffb 100644
--- a/dags/sustainability_score/README.md
+++ b/dags/sustainability_score/README.md
@@ -1,3 +1,23 @@
 # Sustainability score
 
-Placeholder
+This DAG orchestrates the ingestion and transformation of prodcuts from
+Target's website to compute their sustainability score.
+
+## Steps
+
+* create_products_table: create the prodcuts table with it's schema
+* etl_pipeline: run the apache beam etl process
+* dbt_run: run `dbt run` to apply transformations
+* dbt_test: run `dbt test` to test the data quality
+
+## Config
+
+The following parameters are available:
+
+* `input`: location of the CSV input file
+* `beam_etl_path`: location of the apache beam pipeline
+* `dbt_path`: location of the dbt project
+* `products_table`: products_table table name
+
+I decided not to configure the rest of the table locations because that makes
+more sense to be defined in DBT.