add plus operator example to tags doc (#6737)

this pr adds an example combining tags and the plus operator in the
`tags` doc and the `+ operator` doc.

Resolves #6735

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🚀 Deployment available! Here are the direct links to the updated files:


-
https://docs-getdbt-com-git-mirnawong1-patch-26-dbt-labs.vercel.app/reference/node-selection/graph-operators
-
https://docs-getdbt-com-git-mirnawong1-patch-26-dbt-labs.vercel.app/reference/resource-configs/tags

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Co-authored-by: nataliefiann <[email protected]>

Author: mirnawong1

website/docs/reference/node-selection/graph-operators.md

@@ -3,15 +3,19 @@ title: "Graph operators"
 ---
 
 ### The "plus" operator
-If placed at the front of the model selector, `+` will select all ancestors of the selected model and the model itself. If placed at the end of the string, `+` will select all descendants of the selected model and the model itself.
+The `+` operator expands your selection to include ancestors (upstream dependencies) or descendants (downstream dependencies) of a resource. This operator works for individual models, tags, and other resources.
 
+- Placed after a model/resource — Includes the resource itself and all its descendants (downstream dependencies).
+- Placed before a model/resource — Includes the resource itself and all its ancestors (upstream dependencies).
+- Placed on both sides of a model/resource — Includes the resource itself, all its ancestors, and all its descendants.
 
-   ```bash
+```bash
 dbt run --select "my_model+"         # select my_model and all descendants
 dbt run --select "+my_model"         # select my_model and all ancestors
 dbt run --select "+my_model+"        # select my_model, and all of its ancestors and descendants
-  ```
+```
 
+You can use it with selectors for a more specific scope in your commands. You can also combine it with [`--exclude`](/reference/node-selection/exclude) flag for even more finer control over what gets included in your command.
 
 ### The "n-plus" operator
 

website/docs/reference/resource-configs/tags.md

@@ -113,11 +113,18 @@ resource_type:
 Apply a tag (or list of tags) to a resource.
 
 These tags can be used as part of the [resource selection syntax](/reference/node-selection/syntax), when running the following commands:
-- `dbt run --select tag:my_tag`
-- `dbt build --select tag:my_tag`
-- `dbt seed --select tag:my_tag`
-- `dbt snapshot --select tag:my_tag`
-- `dbt test --select tag:my_tag` (indirectly runs all tests associated with the models that are tagged)
+- `dbt run --select tag:my_tag` — Run all models tagged with a specific tag.
+- `dbt build --select tag:my_tag` — Build all resources tagged with a specific tag.
+- `dbt seed --select tag:my_tag` — Seed all resources tagged with a specific tag.
+- `dbt snapshot --select tag:my_tag` — Snapshot all resources tagged with a specific tag.
+- `dbt test --select tag:my_tag` — Indirectly runs all tests associated with the models that are tagged.
+
+#### Using tags with the `+` operator
+You can use the [`+` operator](/reference/node-selection/graph-operators#the-plus-operator) to include upstream or downstream dependencies in your `tag` selection:
+- `dbt run --select tag:my_tag+` — Run models tagged with `my_tag` and all their downstream dependencies.
+- `dbt run --select +tag:my_tag` — Run models tagged with `my_tag` and all their upstream dependencies.
+- `dbt run --select +model_name+` — Run a model, its upstream dependencies, and its downstream dependencies.
+- `dbt run --select tag:my_tag+ --exclude tag:exclude_tag` — Run model tagged with `my_tag` and their downstream dependencies, and exclude models tagged with `exclude_tag`, regardless of their dependencies.
 
 ## Examples
 ### Use tags to run parts of your project