Page Comparison

...

Anchor
alternative-text alternative-text

Alternative text- Provides alternative information for an image if a user for some reason cannot view it (because of slow connection, an error in the src attribute, or if the user uses a screen reader).

Anchor
author author

 AuthorAuthor- Creator of content.

Anchor
block block

Block - Chunks of content that sit inside a page, can contain nodes, views, menus or static content.

...