queues: minor clarity improvements (#13612)

* queues: Update pull-consumers.md

* queues: Update how-queues-works.md

* queues: Apply suggestions from code review

Co-authored-by: Maddy <130055405+Maddy-Cloudflare@users.noreply.github.com>

---------

Co-authored-by: Maddy <130055405+Maddy-Cloudflare@users.noreply.github.com>

content/queues/reference/how-queues-works.md

@@ -177,10 +177,15 @@ To remove a queue from your project, run `wrangler queues consumer remove <queue
 
 ### Pull consumers
 
-A queue can have a HTTP-based consumer that pulls from the queue, instead of messages being pushed to a Worker. This consumer can be any HTTP-speaking service that can communicate over the Internet. Review the [pull consumers](/queues/reference/pull-consumers/) to learn how to configure a pull-based consumer.
+A queue can have a HTTP-based consumer that pulls from the queue, instead of messages being pushed to a Worker.
+
+This consumer can be any HTTP-speaking service that can communicate over the Internet. Review the [pull consumer guide](/queues/reference/pull-consumers/) to learn how to configure a pull-based consumer for a queue.
 
 ## Messages
 
-A message is the object you are producing to and consuming from a queue. Any serializable object can be published to a queue: for most developers, this means either simple strings or JSON objects.
+A message is the object you are producing to and consuming from a queue.
+
+Any JSON serializable object can be published to a queue. For most developers, this means either simple strings or JSON objects. You can explicitly [set the content type](#content-types) when sending a message.
+
+Messages themselves can be [batched when delivered to a consumer](/queues/reference/batching-retries/). By default, messages within a batch are treated as all or nothing when determining retries. If the last message in a batch fails to be processed, the entire batch will be retried. You can also choose to [explictly acknowledge](/queues/reference/batching-retries/) messages as they are successfully processed, and/or mark individual messages to be retried.
 
-Messages themselves can be batched when delivered to the consumer, and messages within a batch are treated as all or nothing when determining retries. If the last message in a batch fails to be processed, the entire batch will be retried.

content/queues/reference/pull-consumers.md

@@ -14,7 +14,7 @@ A pull-based consumer allows you to pull from a queue over HTTP from any environ
 
 Deciding whether to configure a push-based consumer or a pull-based consumer will depend on how you are using your queues, as well as the configuration of infrastructure upstream from your queue consumer.
 
-- Starting with a [push-based consumer](/queues/reference/how-queues-works/#consumers) is the easiest way to get started and consume from a queue. A push-based consumer runs on Workers, and by default, will automatically scale up and consume messages as they are written to the queue.
+- **Starting with a [push-based consumer](/queues/reference/how-queues-works/#consumers) is the easiest way to get started and consume from a queue**. A push-based consumer runs on Workers, and by default, will automatically scale up and consume messages as they are written to the queue.
 - Use a pull-based consumer if you need to consume messages from existing infrastucture outside of Cloudflare Workers, and/or where you need to carefully control how fast messages are consumed. A pull-based consumer must explicitly make a call to pull (and then acknowledge) messages from the queue, only when it is ready to do so.
 
 You can remove and attach a new consumer on a queue at any time, allowing you to change from a pull-based to a push-based consumer if your requirements change.