The driving force in your website.
Entries hold the content that you want to make publicly available via a defined URI or slug of your website (although you don't always have to make them public).
Entries consist of:
A status (disabled, pending, or published)
A publish date (when the entry is set to published)
An optional expiration date (when the entry is set to published)
A title and slug (Singles don't have a slug input, as that is controlled via the Section)
Fields (defined by the section layout)
A optional parent entry (if the entry is in a structure or category section)
The layout the Entry uses (only if the section the entry is contained in provides more than one type of layout)
Entries also have versions, which are snapshots of an entry at a given point in time that cannot be edited. Entries also have a special feature called a draft, drafts allow users to work on entries without affecting the production entry (the entry being publicly displayed on your website). Versions and drafts can be restored to the production entry when necessary, to either roll back changes to specific point (version), or bring in new changes (draft). Versions can also be restored to the draft to enable further edits before restoring to the production entry.
Using the live preview feature you can view changes you have made to an entry without updating and affecting the production or draft entry.
Sections control how entries are related and grouped, and define the layouts (groups of fields) entries can use.
Sections consist of:
Category – A taxonomy of entries.
Channel – A grouping of related entries.
Single – A single entry.
Structure – A order-able taxonomy of entries.
A name and handle
Whether it is the homepage (singles only)
A URI format which defines how entry URI's will look when combined with the user supplied entry slug (except in the case of singles, when the user will not have control over the slug)
A nested entry URI format (structure and categories only)
A max depth (structure and categories only)
A template which controls outputting entires in the section
A rule for how to handle changing slugs (for redirect rule purposes)
Whether or not to automatically create versions when entries are updated
Every section defines at a minimum one layout. Layouts define the fields and field groups that are made available to an entry within the section. When a section has multiple layouts, content creators get to choose which layout they want to use when creating entries within the section.
If the section layout has multiple field groups defined they are listed in tabs on the entry page before the fields in that field group, and can be switched between by clicking them. This aids in breaking apart diverse content used within the layout.