Google Analytics is a powerful free analytics tool provided by google. its powerful features is keyword tracking. Google Analytics will track the inbound search engine queries which includes number people to your website, bounce rate of website, traffic. You can use its keyword feature to analyze your SEO keyword.
Google Analytics tool is use for track website traffic and analyze keyword. It is use for to track visitors of website, help to know bounce rate, which keywords are in highly use and which keyword you need to change or optimize more, Visitors from your indicate location or not. In Google Analytics you can set goal for your business, you can set ecommerce campaign, through advance segments and custom reports you can get filtered report which you want.
Google analytics is a free and powerful tool to track traffic and check competitions on keywords.