Navigate to [https://admin.shopify.com/store/avart-store-online/themes/130516713516/editor](https://admin.shopify.com/store/avart-store-online/themes/130516713516/editor)

Change this image for the main logo, as the header's one

Chose an image for the favicon, the square logo in the main settings by default. The favicon should be square

This is a placeholder image used when the theme try to render an image but it doesn't exists (for products without an image for example)

Avart | Logo settings