repl: summarise REPL purpose

docs/clojure-repl/index.md

@@ -1,5 +1,14 @@
 # Clojure REPL
 
+Use the Clojure repl to
+
+- call functions from clojure core
+- create symbol names (def) that represent a value
+- write custom functions (defn) and call them with data
+- see immediate results when evaluating code
+
+## Getting Started
+
 [:fontawesome-solid-book-open: Install Clojure CLI and Practicalli Clojure CLI Config](https://practical.li/clojure/install/){target=_blank} for a comprehensive set of developmet tools.
 
 Use a [:fontawesome-solid-book-open: terminal UI REPL](#terminal-ui-repl) as a quick way to get started, or set up a preferred [:fontawesome-solid-book-open: Clojure editor](#clojure-editors).