more readme updates

eng/common/scripts/job-matrix/README.md

@@ -40,10 +40,10 @@ to the definition, which is possible because [matrix can accept a runtime expres
 Assume you have a job defined in azure pipelines yaml file. You want to run
 it in a matrix, leveraging the matrix generator functionality.
 
-To do this, you will need to create another pipeline definition that will
-reference your job definition in `JobTemplatePath` and generate the matrix
-based on one or more matrix json configs referenced in `MatrixConfigs`.
-That pipeline will use as template the definition
+To do this, you will need to create another job that will reference your job
+definition in its `JobTemplatePath` parameter and generate the matrix
+based on one or more matrix json configs referenced in its `MatrixConfigs` parameter.
+That job will use as template the definition
 [`archetype-sdk-tests-generate.yml`](https://github.com/Azure/azure-sdk-tools/blob/main/eng/common/pipelines/templates/jobs/archetype-sdk-tests-generate.yml).
 
 ### Matrix generator usage example
@@ -56,7 +56,10 @@ And the path of matrix config you want to use is:
 
 * [`eng/common/scripts/job-matrix/samples/matrix.json`](https://github.com/Azure/azure-sdk-tools/blob/main/eng/common/scripts/job-matrix/samples/matrix.json)
 
-Here is how you can wire up together your job with the matrix generation logic:
+If now you want to run the job defined in `matrix-job-sample.yml` in a matrix, with all
+the matrix configuration instances generated with appropriate values by matrix generator
+based on `matrix.json`, you need to introduce a job using the `archetype-sdk-tests-generate.yml` template that
+will set up your job with the matrix config. It can look like this:
 
 ``` yaml
 jobs:
@@ -84,7 +87,7 @@ jobs:
       PreGenerationSteps: []
 ```
 
-To see an example of a complete definition leveraging the matrix logic, see
+To see an example of a complete pipeline definition with a job that runs your job using matrix generator, refer to
 [`/eng/common/scripts/job-matrix/samples/matrix-test.yml`](https://github.com/Azure/azure-sdk-tools/blob/main/eng/common/scripts/job-matrix/samples/matrix-test.yml).
 
 ### A note regarding PreGenerationSteps