On the dashboard of Google Analytics You will get a chart that will display a graph of visits for the period of time that you specify. By changing the time period in the upper right hand corner you change the reporting on the Google Dashboard. You can change the date ranges to accommodate your need for information. For instance if you start an ad campaign on March 1st that ends June 31st you can run the reports on the dashboard to deliver that time period so you can look at traffic from 3/1 – 6/31.
Number of distinct visitors to your website, usually determined by which computer has visited your site. More than one user may use a computer, but this a pretty reliable.
Pageviews are more significant than hits. Pageviews describe any content delivered through a web server such as web pages, posts, documents, image video or text files.
Shows you the average number of pages each visitor views in a total visit.
Informs you of the percentage of visits where your visitor leaves your site starting at the entrance page. Your goal should be a low percentage on the bounce rate because a high percentage indicates people leaving your site.
Google is all about relevance. The higher the bounce rate the lower relevance, interest and user happiness.
Avg Time on Site
Shows the average time each visitor spends on your website. If a visitor leaves your site open that page is considered abandoned after a specified period of time.
% New Visits
Shows the percentage of new visitors to your website. It's good to have new visitors coming to your site on a regular basis. If you are running ad campaigns you should see a solid increase in this percentage when you stat a new marketing strategy.
Visitors Overview mirrors the chart at the top
Map overlay shows you by color intensity what areas your visitors are coming from. The darker the color, the more visitors from that region.