01) Access the Control Panel
02) After login click on Catalog >> MercadoLivre
03) After clicking Layout Mercado Livre
04) In the desired template in the line click the green ball to Activate
05) After clicking on EDIT
06) In the Top Description field enter the logo of your business
07) After clicking the UPDATE button
Automatically the template will be inserted in the description when publishing or exporting products to the MercadoLivre