what is best tool for seo ?

[Jaygour]

Google Webmaster is best one.

[pixelaura]

There are so many tools for SEO, but given below are best..

SEMrush
Woorank
Spyfu
SEOMoz

Given below are two most important Google's free tools

Google Webmater & Google Analytic


Thanks

[SultanMirza]

Google webmaster , adwords or keyword planner are best.

[DenialClark]

Google webmaster and keyword planner tool is best.

[seetharam2492]

Google webmaster tool is the best tool for seo.

[SultanMirza]

Google webmaster and keyword planner both are best one.

[Jaygour]

Keyword Planner,Backlink Checker and Google Webmaster tools are best.