Google Analytics is used to provide detailed statistics of visits to your blog such as who’s coming to your blog site, how they’re getting there and what interests them.

CREATE GOOGLE ANALYTICS ACCOUNT

1. If you are new to Google Analytics, click on the link to 'sign up for Google Analytics' or go to http://google.com/analytics.

2. Click Sign in.

3.  Click on Google Analytics.

4.  Sign in with your gmail account or click on Create Account to create a gmail account.

SET UP GOOGLE ANALYTICS TRACKING ID

Once you have created a Google Analytics account, you’ll need to create a tracking ID for your blog.

1. In your Google Analytics account, click the Admin dashboard.

2. Under the Accounts panel, create a new account.

3. Select “Website” and “Universal Analytics”

4. Fill in your account and web property information.

5. Select your Data Sharing Settings, and click “Get Tracking ID”

6. Accept the Google Analytics Terms of Service Agreement.

7. Copy your Tracking ID

SET BASIC NETWORK TRACKING SETTINGS

1.  Go to Settings > Google Analytics in your blog dashboard.

2. Click Login with Google account.

2. Grant Google Analytics access.

3. Paste your Google Analytics tracking ID in the Site Tracking Code field.

4. Select Tracking ID for your blog from the drop-down menu.

5. Click Save Changes.

After saving changes, your Dashboard > Statistics may take up to 24 hours to load visitor data.
To view more in-depth information about your visitors into http://google.com/analytics
If you want outside visitors to come to your blog, make sure to set your Site Settings to “Allow search engines to index this site.” in Settings > Reading.
To learn more about the statistics displayed, read this quick tutorial.