Explanatory text under Title and Description fields

Hello,

From reading the forum posts and doing some testing I have found that the search (in the header on the home page) searches the title and description fields of the listings. So, on the Add Listing page I would like to add a note under these fields making users aware of this so that they think about potential search terms in writing their descriptions.

Where I have created custom fields for the add listing page I have been able to write some explanatory text underneath. Is it possible for me to do this for the Title and Description fields under the Listing Description?

Thank you,
Michelle