- Google Analytics (google.com/analytics)
A completely free service that generates detailed statistics about visitors to your website, Google Analytics is the simplest and most robust web analytics offering. Currently used by over 50% of the top 10,000 websites in the world, according to the site's usage statistics, you can find out where your visitors are coming from, what they're doing while on your site and how often they come back, among many other things. As you get more involved in the site's analytics, you can receive more detailed reports, but it's that ease of use that makes it one of the most popular services.
"There's really only one tool for small businesses need and that's Google Analytics," notes Penn. "It's so incredibly robust in terms of what it offers and if someone tells you that Google Analytics isn't enough for a small business, then frankly they have no idea how to use it properly."
Google Analytics was the unanimous favorite of all the web analytics experts we talked to. -Recommended by all experts