Update README.md

README.md

@@ -1,7 +1,8 @@
 # arena.h
 
 A single header library that implements
-[region-based memory management](https://en.wikipedia.org/wiki/Region-based_memory_management) in C.
+[region-based memory management](https://en.wikipedia.org/wiki/Region-based_memory_management)
+in C using a linked list approach.
 
 ## Example
 
@@ -11,7 +12,7 @@ A single header library that implements
 
 int main(void)
 {
-    Arena a = {0};
+    Arena a = {0}; // or arena_create(...) to specify the region capacity
 
     int *x = arena_alloc(&a, sizeof(*x) * 69);
     float *y = arena_alloc(&a, sizeof(*y) * 420);