Add HTML metadata.

Add TODOs.
Add periods.

Author: stevepiercy

docs/backend/behaviors.md

@@ -1,10 +1,10 @@
 ---
 myst:
   html_meta:
-    "description": ""
-    "property=og:description": ""
-    "property=og:title": ""
-    "keywords": ""
+    "description": "Behaviors are re-usable bundles of functionality that can be enabled or disabled on a per-content type basis."
+    "property=og:description": "Behaviors are re-usable bundles of functionality that can be enabled or disabled on a per-content type basis."
+    "property=og:title": "Behaviors"
+    "keywords": "Behaviors"
 ---
 
 (backend-behaviors-label)=
@@ -13,5 +13,10 @@ myst:
 
 
 ```{seealso}
-See the chapter {ref}`training:behaviors1-label` from the Mastering Plone 6 Training
+See the chapter {ref}`training:behaviors1-label` from the Mastering Plone 6 Training.
 ```
+
+```{todo}
+Contribute to this documentation!
+See issue [Backend > Behaviors needs content](https://github.com/plone/documentation/issues/1302).
+```

docs/backend/content-types.md

@@ -1,21 +1,26 @@
 ---
 myst:
   html_meta:
-    "description": ""
-    "property=og:description": ""
-    "property=og:title": ""
-    "keywords": ""
+    "description": "A content type is a kind of object that can store information and is editable by users."
+    "property=og:description": "A content type is a kind of object that can store information and is editable by users."
+    "property=og:title": "Content Types"
+    "keywords": "Content Types"
 ---
 
 (backend-content-types-label)=
 
 # Content Types
 
 ```{seealso}
-See the chapter {ref}`training:dexterity1-label` from the Mastering Plone 6 Training
+See the chapter {ref}`training:dexterity1-label` from the Mastering Plone 6 Training.
+```
+
+```{todo}
+Contribute to this documentation!
+See issue [Backend > Content Types needs content](https://github.com/plone/documentation/issues/1303).
 ```
 
 ```{todo}
 Describe how to add a content type (Python/XML) including FTI settings.
-Fields, Widgets, Vocabularies aso are descripted in detail in there own chapter and will be referenced frome examples here.
+Fields, Widgets, Vocabularies aso are descripted in detail in their own chapter and will be referenced frome examples here.
 ```

docs/backend/control-panels.md

@@ -45,5 +45,10 @@ To manually register a view as a control panel, add the following registration t
 ```
 
 ```{seealso}
-See the chapter {ref}`training:controlpanel-label` from the Mastering Plone 6 Training
+See the chapter {ref}`training:controlpanel-label` from the Mastering Plone 6 Training.
 ```
+
+```{todo}
+Contribute to this documentation!
+See issue [Backend > Control Panels needs content](https://github.com/plone/documentation/issues/1304).
+```

docs/backend/fields.md

@@ -1,18 +1,23 @@
 ---
 myst:
   html_meta:
-    "description": ""
-    "property=og:description": ""
-    "property=og:title": ""
-    "keywords": ""
+    "description": "Fields are objects that have properties and types, and comprise a schema."
+    "property=og:description": "Fields are objects that have properties and types, and comprise a schema."
+    "property=og:title": "Fields"
+    "keywords": "Fields, schema, autoform, supermodel, XML"
 ---
 
 (backend-fields-label)=
 
 # Fields
 
 ```{seealso}
-See the chapter {ref}`training:dexterity-reference-label` from the Mastering Plone 6 Training
+See the chapter {ref}`training:dexterity-reference-label` from the Mastering Plone 6 Training.
+```
+
+```{todo}
+Contribute to this documentation!
+See issue [Backend > Fields needs content](https://github.com/plone/documentation/issues/1305).
 ```
 
 (backend-fields-schema-label)=

docs/backend/vocabularies.md

@@ -1,16 +1,21 @@
 ---
 myst:
   html_meta:
-    "description": ""
-    "property=og:description": ""
-    "property=og:title": ""
-    "keywords": ""
+    "description": "Vocabularies are often used for select fields. They allow editing through the user interface or can be updated dynamically."
+    "property=og:description": "Vocabularies are often used for select fields. They allow editing through the user interface or can be updated dynamically."
+    "property=og:title": "Vocabularies"
+    "keywords": "Vocabularies, schema, select"
 ---
 
 (backend-vocabularies-label)=
 
 # Vocabularies
 
 ```{seealso}
-See the chapter {ref}`training:vocabularies-label` from the Mastering Plone 6 Training
+See the chapter {ref}`training:vocabularies-label` from the Mastering Plone 6 Training.
 ```
+
+```{todo}
+Contribute to this documentation!
+See issue [Backend > Vocabularies needs content](https://github.com/plone/documentation/issues/1306).
+```

docs/backend/widgets.md

@@ -1,18 +1,23 @@
 ---
 myst:
   html_meta:
-    "description": ""
-    "property=og:description": ""
-    "property=og:title": ""
-    "keywords": ""
+    "description": "Widgets render HTML inputs in a form."
+    "property=og:description": "Widgets render HTML inputs in a form."
+    "property=og:title": "Widgets"
+    "keywords": "Widgets"
 ---
 
 (backend-widgets-label)=
 
 # Widgets
 
 ```{seealso}
-See the chapter {ref}`training:dexterity-reference-label` from the Mastering Plone 6 Training
+See the chapter {ref}`training:dexterity-reference-label` from the Mastering Plone 6 Training.
+```
+
+```{todo}
+Contribute to this documentation!
+See issue [Backend > Widgets needs content](https://github.com/plone/documentation/issues/1307).
 ```
 
 (backend-widgets-autoform-label)=

docs/backend/workflows.md

@@ -1,16 +1,21 @@
 ---
 myst:
   html_meta:
-    "description": ""
-    "property=og:description": ""
-    "property=og:title": ""
-    "keywords": ""
+    "description": "Workflows are used in Plone to keep track of metadata, chiefly an object's state, create content review cycles and model other types of processes, and to manage object security."
+    "property=og:description": "Workflows are used in Plone to keep track of metadata, chiefly an object's state, create content review cycles and model other types of processes, and to manage object security."
+    "property=og:title": "Workflows"
+    "keywords": "Workflows"
 ---
 
 (backend-workflows-label)=
 
 # Workflows
 
 ```{seealso}
-See the training {ref}`training:workflow-label`
+See the training {ref}`training:workflow-label`.
 ```
+
+```{todo}
+Contribute to this documentation!
+See issue [Backend > Workflows needs content](https://github.com/plone/documentation/issues/1308).
+```