The footer of your page will be different depending on the theme you have chosen. The biggest difference will be between business and personal themes where, besides the avatar and the connected social networks, you can enter the legal data of your business.
You can customize the footer from the Site Editor area, from there you can decide to hide some items that you don't need. Just click on the item you want to hide and click on the eye button.
For the avatar, you can choose to upload a new photo or import one from one your connected social.
You can hide the logo "Made with love by Swite" only if you are a Plus or Premium user.