Post

Noun

A post is a piece of content created by an account on a social media platform.

The word "posts" and "content" is often used interchangeably, but content is more broad and general.

A post is an actual piece of content that can be identified and/or located using some unique identifier/locator, and many "posts" can be created. The idea of "content", on the other hand, is more broad. Content could refer to a profile picture. But, a profile picture is often not a post that an account sends. A profile picture is often just a unique attribute of an account, and only one profile picture can be retrieved.

So in short, an account can have multiple posts, but a piece of content is not exclusively a post.

Verb

To post a piece of content means to perform an action on a social media platform that could result in the creation of a post, on said platform.