update readme

Author: ArturU043

README.md

@@ -2,9 +2,24 @@
 This repository provides analysis tools to be used with the [ServiceX Client](https://github.com/ssl-hep/ServiceX_frontend/tree/master)
 
 ### To install 
-'''
+```
 pip install servicex-analysis-utils
-'''
+```
+
+##### This package contains the to_awk() function:
+```
+    Load an awkward array from the deliver() output with uproot or uproot.dask.
+
+    Parameters:
+        deliver_dict (dict): Returned dictionary from servicex.deliver()
+                            (keys are sample names, values are file paths or URLs).
+        dask (bool):        Optional. Flag to load as dask-awkward array. Default is False
+        **uproot_kwargs :   Optional. Additional keyword arguments passed to uproot.dask or uproot.iterate
+
+    
+    Returns:
+        dict: keys are sample names and values are awkward arrays or dask-awkward arrays.
+```
 
 ## Documentation
-The different functions are documented in [ServiceX Documentation](https://servicex-frontend.readthedocs.io)
+The different functions are documented in TBD