Menu / option
Defines your brand, most notably on search engines (Google, Yahoo!, Bing...).
"Shops" menu, "Shops" option, then click the shop name.
Defines your brand, visually and on your invoices.
"Preferences" menu, "Themes" option, "Appearance" section, then change the various default images to your logo.
Customer service info
Displayed in the front-office, right column.
"Block contact" module.
Displayed in the front-office, footer.
"Block contact infos" module.
Image displayed in front-end
"Block advertising" module.
A slider usually placed front and center of the homepage, and therefore a visual signature for your shop and products.
"Image slider for your homepage" module.
The content of static pages, such as "About Us", "Delivery", "Legal Notice", "Terms and Conditions", and "Secure Payment". Some of them have default content, which you should update; some others are empty, and you should paste your own text.
"Preferences" menu, "CMS" options, then edit each page at will.