fixup wording

Author: bleggett

README.md

@@ -1,6 +1,6 @@
 # edera-check CLI
 
-CLI tool to run checks and generate system reports before installing or using Edera.
+A CLI tool to validate your system is ready to install or use Edera, and generate local readiness reports.
 
 ---
 
@@ -18,12 +18,16 @@ sudo edera-check --help
 sudo edera-check preinstall
 ```
 
+Run this on fresh system without Edera to validate it is ready for an Edera install.
+
 ### Run postinstall checks and generate system report
 
 ```bash
 sudo edera-check postinstall
 ```
 
+Run this on a system that has been booted into an Edera installation to validate it is functional and ready to use.
+
 ### Run official release via Docker
 
 ```bash
@@ -34,7 +38,7 @@ docker run \
   us-central1-docker.pkg.dev/edera-protect/staging/edera-check:main preinstall
 ```
 
-Podman et al should also work.
+`podman` et al should also work.
 
 ### Run locally from repo root via Docker