Miiduu stores allow paid users to embed coding into their store templates. If you want to put the Facebook "like" button or payment icons into the store footer, you can embed coding for the buttons or icons in the store footer. 

Let's take the Facebook "like" button as an example:

Go to the Facebook site to get the coding for the Facebook " like " button and copy it first. 

Next, go to your store 
administration->"Design"->"Theme"->"Edit HTML/CSS->Theme name->Template->Common->Footer.tpl to paste the coding.

Lastly, check it in 
your storefront.