Add short intro text

antonkomarev · antonkomarev · commit 1d5a8b54bc8c · 2022-05-11T08:49:08.000+03:00
diff --git a/README.md b/README.md
@@ -9,7 +9,7 @@
 
 ## Introduction
 
-> TODO: Write introduction
+PHP application-level database locking mechanisms to implement concurrency control patterns.
 
 Supported drivers:
 
