1-From your Admin page, click on the icon with the 3 lines (hamburger button ☰) next to View your store, Store configurations>Store identity
2-From Store identity scroll down till you find the Media section, there you can choose and upload your store logo, store favicon (the small picture of your logo that appears beside your store name in the browser page tab)
and you can also add your homepage banner.
3-You can view how your logo will look to your customers by clicking on View my store at the top of your store Admin control page.
4-In your store frontpage, you will find your store logo at the top of the homepage instead of the logo here section.
5-At the top of your store frontpage, you will find your store favicon (the small picture of your logo that appears beside your store name in the browser page tab), that is how it looks like.
6-In your store frontpage, scroll down till you find your store home banner, it will look like the “buy now” picture shown below, but of course, you can change it as mentioned above.
8-Scroll down till you find your homepage footer, and you will see your logo there too instead of the logo here section.