diff --git a/README.md b/README.md
index cad7c0a3..4fdd49e8 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,9 @@
 
 Python codes for robotics algorithm.
 
+
 # Table of Contents
+   * [What is this?](#what-is-this)
    * [Requirements](#requirements)
    * [How to use](#how-to-use)
    * [Localization](#localization)
@@ -70,7 +72,7 @@ Feature:
 
 2. Minimum dependency.
 
-3. Easy to read for understanding the algorithm's basic idea.
+3. Easy to read for understanding each algorithm's basic idea.
 
 # Requirements
 
@@ -619,3 +621,4 @@ Atsushi Sakai ([@Atsushi_twi](https://twitter.com/Atsushi_twi))
 
 
 
+