Google Trends can be found at http://www.google.com/trends.
Its useful in that it can help you visualise trends on search phrases for countries and then cities. So how can we make the most of this free service.
Easy if you think you have a killer key phrase use Google trends to check that you’re right. Also plan ahead on seasonal searches to see if you’re on the right track. Check your phrases and plan ahead, check in Google Adwords to make sure you are timing your adverts correctly.
Google trends won’t make you an Internet millionaire, but it will help you stop making the huge gaffs that I see everyday by webmasters.
In this example you can see what happened when Manchester United played Chelsea:
Or in this one look at the interest when Obama wins the election:
Or here see what happened at the Olympic games:
Dependent on your market sector you can plan for future events and adjust your marketing based on historic information.