What are the S3 Objects?

Objects are the fundamental entities stored in Amazon S3. Objects consist of object data and metadata, so each object has two sections to it. First is the data for the object, for example, the content of the image file, and second is the metadata for the objects. Metadata or properties to the object, for example, name, owner name, or department, can be extremely useful for reporting purposes. The metadata describes the object, such as the date last modified or content type. Custom metadata at the time the object is stored can also be specified. Also, each object has a key. The key is a unique identifier for an object within a bucket. Every object in a bucket has exactly one key which is used to access the object from S3.