I’m a newbie to object storage.

I’m trying to build an ecommerce site where users can view the list of products (with images) and the sellers can upload images for their products.

I’m thinking about making the bucket public so that my ecommerce site could display the images of the products. And for uploading the images, I will use the AWS S3 Java SDK.

I understand that uploading the image will add to a Class A operation.

I have the following questions,

1. Does displaying the image with its public URL on my site add to Class B operation?
2. Does using a presigned URL and downloading an image add to Class B operation?
3. If the answer to the above 2 questions are “Yes”, then what does Zero Egress cost really mean?