Some Important Changes
1- You will get to see only exact match statistics.
2- You cannot target specific mobile devices with this tool.
3- No global and local monthly search volume columns. Instead you will see only average monthly searches.
4- No local search trends. You can see the average monthly searches segmented by month when you download historical stats.
5- The columns ‘search share’ and ‘extracted from webpage’ has retired.
Also See:-
The Keyword Planner Tool
How to Calculate Keyword Effectiveness Index?
Determine a Keyword’s Overall Worth with Netmark’s Keyword Intelligence Tool
Seo Tools
Keyword Density
Seo Tutorial
Keyword Stemming
How to do Effective Keyword Research