Updated docstring.

src/cpp/include/openvino/genai/scheduler_config.hpp

@@ -31,7 +31,12 @@ struct SchedulerConfig {
     // max number of scheduled sequences (you can think of it as "max batch size")
     std::size_t max_num_seqs = 256;
 
-    // enable caching of KV-blocks and reusage in next generations.
+    // Enable caching of KV-blocks.
+    // When turned on all previously calculated KV-caches are kept in memory for future usages.
+    // KV-caches can be rewritten if KV-cache limit is reached, but blocks are not released.
+    // This results in more RAM usage, maximum RAM usage is determined by cache_size or num_kv_blocks parameters. 
+    // When turend off only KV-cache required for batch calculation is kept in memory and 
+    // when a sequence has finished genegartion its cache is released.
     bool enable_prefix_caching = false;
 };
 }