guide: Tracking data guide and

comments with the cmmands related to Sync'ing and Versioning

content/docs/user-guide/data-management/index.md

@@ -83,7 +83,7 @@ Refer to [Versioning Data and Models] to learn more.
 </admon>
 
 [version control]:
-  https://www.atlassian.com/git/tutorials/what-is-version-control
+  https://git-scm.com/book/en/v2/Getting-Started-About-Version-Control
 [git workflows]: https://www.atlassian.com/git/tutorials/comparing-workflows
 
 <!--

content/docs/user-guide/data-management/track-sync-version.md

@@ -11,12 +11,61 @@ it's also included automatically in more advanced features like [pipelining] and
 
 ## Tracking data
 
-...
+DVC is [similar to Git] in this area. To start tracking large files or
+directories, "add" them to DVC with the `dvc add` command. This hides the data
+from Git, moves it to the <abbr>cache</abbr>, [links it] back to the
+<abbr>workspace</abbr>, and creates an accompanying `.dvc` file (visible to
+Git). Now your code (including DVC metafiles) is physically separated from your
+data!
+
+<admon type="info">
+
+`.dvc` files can be tracked (and versioned) with Git directly. This ties
+everything together (more about this in [Versioning data](#versioning-data)
+below).
+
+</admon>
+
+To check what's happening with the data in your project, use `dvc data status`.
+This will list changes to DVC-tracked data as well as files unknown to DVC (or
+Git).
+
+To capture changes to tracked data, `dvc add` it again. Alternatively,
+`dvc commit` will also do the trick. This caches the latest data present in the
+workspace and updates `.dvc` files accordingly (changes visible to Git). If you
+need to move or rename tracked data without content changes, use `dvc move`.
+
+Finally, to stop tracking data, use `dvc remove`. To also remove it from the
+cache (either the latest or historic versions), use `dvc gc`. See [more
+details].
+
+<admon type="tip">
+
+Other commands related to tracking data: `dvc unprotect`, `dvc import`, and
+`dvc import-url`.
+
+</admon>
+
+[similar to git]:
+  https://git-scm.com/book/en/v2/Git-Basics-Recording-Changes-to-the-Repository
+[links it]: /doc/user-guide/data-management/large-dataset-optimization
+[more details]: /doc/user-guide/how-to/stop-tracking-data
 
 ## Synchronizing data
 
 ...
 
+<!--
+remote add, modify, etc.
+push
+fetch
+pull
+-->
+
 ## Versioning data
 
 ...
+
+<!--
+dvc diff
+-->