An object is the value in the entry of the git database key-value.
All entities in git are objects.
Objects are the entity of the Git file system.
On the operating file system, the objects are stored at .git/objects.
The commit object 1) stores information about:
The object identifier is a sha hash
You can have Git tell you the object type (tree or blob) with the -t option of cat-file and its hash.
git cat-file -t 1f7a7a472abf3dd9643fd615f6da379c4acb3e3a
blob
# or
commit