Add component subheadings

sdk/src/zpages/README.md

@@ -1,24 +1,35 @@
 # zPages
 ## Summary
-zPages allow easy viewing of tracing information. When included for a process, zPages will display basic information about that process on a webpage. There are currently two types of zPages: TraceZ and RPCz. on a webpage.
+zPages allow easy viewing of tracing information. When included for a process, zPages will display basic information about that process on a webpage. There are currently two types of zPages: TraceZ and RPCz.
 
 This is useful because it's quicker to get running than adding extra code and installing external exporters.It also helps with debugging latency issues and deadlocks.
 
-This idea originates from one of OpenTelemetry's predecessors, [OpenCensus](https://opencensus.io/). You can read more about it [here](https://opencensus.io/). 
+The idea of 'zPages' originates from one of OpenTelemetry's predecessors, [OpenCensus](https://opencensus.io/). You can read more about it [here](https://opencensus.io/). There has also been similar implementations and solutions at companies like Uber.
 
-The basic flow of zPages reads from the processes spans using a SpanProcessor, which exports spans to the appropriate DataAggregator that gets information from spans to send to the HttpServer.
+On a high level, zPages work by reading a processes spans using a SpanProcessor, which exports spans to the appropriate DataAggregator to then send to the HttpServer.
 
-TODO: Add picture examples for span overview and specific span view
+
+> TODO: Add picture examples for span overview and individual span view
 
 ### TraceZ
-TraceZ is a type of zPage that shows information on tracing spans, and allows users to look closer at specific and individual spans. Details a user would view include: span id, name, status, and timestamps. 
+TraceZ is a type of zPage that shows information on tracing spans, and allows users to look closer at specific and individual spans. Details a user would view include span id, name, status, and timestamps. The individual components of TraceZ are as follows: 
+
+#### TracezSpanProcessor
+Serving as the starting point of a zPage, SpanProcessor collects spans and provides an interface for DataAggregator.
+
+#### TracezDataAggregator
+This uses the SpanProcessor to do various functions to send spans to the HttpServer.
+
+#### TracezHttpServer
+Interactive webpages are generated and served using this, which gets information using the DataAggregator.
+
 
 ### RPCz
 RPCz is a type of zPage that provides details on instrumented sent and received RPC messages. There is currently no ongoing development of RPCz. 
 
 # Getting Started
 
-TODO: Add instructions to add zPages
+> TODO: Add instructions to add zPages
 
 ### Links of Interest
 - [TracezSpanProcessor Design Doc](https://docs.google.com/document/d/1kO4iZARYyr-EGBlY2VNM3ELU3iw6ZrC58Omup_YT-fU/edit#)