Update app.py

app.py

@@ -33,6 +33,9 @@ with gr.Blocks(css=css) as demo:
         <h2 style="text-align: center;">
             SDXL Using Direct Preference Optimization
         </h2>
+        <p style="text-align: center;">
+            Direct Preference Optimization (DPO) for text-to-image diffusion models is a method to align diffusion models to text human preferences by directly optimizing on human comparison data.
+        </p>
         """)
         prompt_in = gr.Textbox(label="Prompt", value="An old man with a bird on his head")
         submit_btn = gr.Button("Submit")