Reword redirector's role

Author: djw8605

docs/index.md

@@ -11,5 +11,5 @@ StashCache operations consist of the following documents:
 
 * [StashCache caches](admin/install.md): Managed by an organization, **"cache"** server to keep data cached and immediately available (via [stashcp](https://support.opensciencegrid.org/support/solutions/articles/12000002775-transferring-data-with-stashcach))within Stash federation (without re-transfering from "origin").
 * [StashCache origins](admin/install.md): Managed by an organization, **"origin"** is data server to host files locally and serve them to users upon transfer request (via [stashcp](https://support.opensciencegrid.org/support/solutions/articles/12000002775-transferring-data-with-stashcach)) unless data are already cached.
-* [StashCache redirectors](ops/redirector.md): Redirectors are managed by OSG Operations, redirectors provides federated access to the data across origins.
+* [StashCache redirectors](ops/redirector.md):  Redirectors are managed by OSG Operations. Redirectors help clients locate the correct **origin** server to retrieve data.
 * [StashCache upgrades](ops/upgrades.md): Keeps track of versions deployed at sites as well as other information about OS, system resources, connectivity, etc.