If you search for a streamlit app on google you get following result.
Something like …
st.set_page_config(meta = 'A little description of the app for a better SEO on google')
… would be great.
I know that you can already change the title in the header section and the favicon with:
st.set_page_config( page_title='Title of my App', page_icon="😍" )
…but the people searching for your app would benefit from this.