You can add / edit / delete footer links as you like.
Login to your website, put the home page in edit mode
Scroll to footer, click on area you would like to edit
The footer blocks may be either standard WYSIWYG content blocks, or Manual Nav blocks.
Both are shown below.
From the Content Block, you can edit names, style content, delete links and add new links
From the Manual Nav block you can edit names, delete links and add new links
Once you are done, save, finish editing the page, save, publish & approve changes
MANUAL NAV BLOCK
You can also add in images to your footer.
Login to your website. Edit the homepage. Scroll to footer. Add in a new image block to the area shown.
IMPORTANT - always make sure you add in an alt caption for any image you add to your site. It is required by law for web accessibility standards.