Add some descriptive text to the UI

app.py

@@ -66,7 +66,12 @@ with block:
         inputs=request
     )
 
-    gr.HTML("See <a href='https://reasonwithpal.com/'>PAL: Program-aided Language Models</a>")
+    gr.HTML("""
+    This simple app demonstrates a couple of techniques for using GPT-3 to solve math problems. 
+    The first technique is to simply ask GPT-3 to solve the problem. The second technique is to use 
+    GPT-3 to interpret the problem and then create/run a Python program to solve it. The program is 
+    generated using the PALChain from the <a href='https://github.com/hwchase17/langchain'>LangChain</a> library.
+    See <a href='https://reasonwithpal.com/'>PAL: Program-aided Language Models</a>""")
 
     gr.HTML("<center>Powered by <a href='https://github.com/hwchase17/langchain'>LangChain 🦜️🔗</a></center>")