Updating Delegator doc introduction (graphprotocol#53)

Author: bermchain

pages/en/delegating.mdx

@@ -2,7 +2,9 @@
 title: Delegator
 ---
 
-Delegators cannot be slashed for bad behavior, but there is a deposit tax on Delegators to disincentivize poor decision making that could harm the integrity of the network.
+Delegators are network participants who delegate (i.e., "stake") GRT to one or more Indexers. Delegators contribute to securing the network without running a Graph Node themselves.
+
+By delegating to an Indexer, Delegators earn a portion of the Indexer's query fees and rewards. The amount of queries an Indexer can process depends on the Indexer's own (and delegated) stake and the price the Indexer charges for each query, so the more stake that is allocated to an Indexer, the more potential queries they can process.
 
 ## Delegator Guide
 
@@ -18,6 +20,8 @@ Listed below are the main risks of being a delegator in the protocol.
 
 ### The delegation fee
 
+Delegators cannot be slashed for bad behavior, but there is a deposit tax on Delegators to disincentivize poor decision making that could harm the integrity of the network.
+
 It is important to understand that every time you delegate, you will be charged 0.5%. This means if you are delegating 1000 GRT, you will automatically burn 5 GRT.
 
 This means that to be safe, a Delegator should calculate what their return will be by delegating to an Indexer. For example, a Delegator might calculate how many days it will take before they have earned back the 0.5% deposit tax on their delegation.