Partner Experience: Update Horizon documentation

docs/accessing-data/overview.mdx

@@ -5,7 +5,7 @@ sidebar_position: 0
 
 ## What is Hubble?
 
-Hubble is an open-source, publicly available dataset that provides a complete historical record of the Stellar network. Similar to Horizon, it ingests and presents the data produced by the Stellar network in a format that is easier to consume than the performance-oriented data representations used by Stellar Core. The dataset is hosted on BigQuery–meaning it is suitable for large, analytic workloads, historical data retrieval and complex data aggregation. **Hubble should not be used for real-time data retrieval and cannot submit transactions to the network.** For real time use cases, we recommend [running an API server](/docs/run-api-server).
+Hubble is an open-source, publicly available dataset that provides a complete historical record of the Stellar network. Similar to Horizon, it ingests and presents the data produced by the Stellar network in a format that is easier to consume than the performance-oriented data representations used by Stellar Core. The dataset is hosted on BigQuery–meaning it is suitable for large, analytic workloads, historical data retrieval and complex data aggregation. **Hubble should not be used for real-time data retrieval and cannot submit transactions to the network.** For real time use cases, we recommend [running an API server](/docs/run-platform-server).
 
 This guide describes when to use Hubble and how to connect. To view the underlying data structures, queries and examples, use the [Viewing Metadata](/docs/accessing-data/viewing-metadata) and [Optimizing Queries](/docs/accessing-data/optimizing-queries) tutorials.
 

docs/fundamentals-and-concepts/stellar-stack.mdx

@@ -15,11 +15,11 @@ Nodes reach consensus using the Stellar Consensus Protocol, which can you can le
 
 Anyone can run a Stellar Core node, but you don’t have to in order to build on Stellar. We recommend you do so if you issue an asset and want to ensure the accuracy of the ledger and/or if you want to contribute to Stellar’s overall health and decentralization. Check out our tutorial on installing, configuring, and maintaining your own node here: [Run a Core Node Tutorial](../run-core-node)
 
-## Horizon API
+## Platform Services
 
-Horizon is the client-facing RESTful HTTP API server that allows programmatic access to submit transactions and query the network’s historical data. It acts as the interface for applications that want to access the Stellar network. You can communicate with Horizon using an SDK, a web browser, or with simple command tools like cURL.
+Horizon is the client-facing RESTful HTTP API server in the platform layer which allows programmatic access to submit transactions and query the network’s historical data. It acts as the interface for applications that want to access the Stellar network. You can communicate with Horizon using an SDK, a web browser, or with simple command tools like cURL.
 
-You do not need to run your own Horizon instance — when you're getting started, you can use the free SDF Horizon instance to access the network — but it is recommended that you do when you’re ready to launch a finished product. Check out how to do so here: [Run an API Server Tutorial](../run-api-server)
+You do not need to run your own Horizon instance — when you're getting started, you can use the free SDF Horizon instance to access the network — but it is recommended that you do when you’re ready to launch a finished product. Check out how to do so here: [Run Platform Server Tutorial](../run-platform-server)
 
 Learn all there is to know about using Horizon in the Horizon [API Reference documentation](https://developers.stellar.org/api).