The header will contain information such as the name, avatar, link to the profile of the user who posted, and the date the post was created.
mern-social/client/post/Post.js:
<CardHeader avatar={<Avatar src={'/api/users/photo/'+this.props.post.postedBy._id}/>} action={this.props.post.postedBy._id === auth.isAuthenticated().user._id && <IconButton onClick={this.deletePost}> <DeleteIcon /> </IconButton> } title={<Link to={"/user/" + this.props.post.postedBy._id}> {this.props.post.postedBy.name} </Link>} subheader={(new Date(this.props.post.created)).toDateString()} className={classes.cardHeader}/>
The header will also conditionally show a delete button if the signed-in user is viewing their own post.