For the majority of websites, approximately 70% of their traffic will come from Google. It's been a mainstream Search Engine for over 10 years and now is a household name.

Given this, Google has create a suite of tools to aid web developers and SEO Consultants optimise their websites.

Google Trends Insights for Search
Use it as a competitor analysis and keyword tool. Great tool to give you a detailed breakdown of the usage of a search term. Allows you to investigate current trends (Rising Searches) or drill down to investigate related search terms. Use it to identify competitor websites and whether or not people are over taking you on brand related search terms or direct domain searches.

Features
Location breakdown of search terms

Future forecast of searches

Related Competitors

Past trending in News


Example


Competitor Brand Terms
Use Google Insights to check searches for competitor domains. This will allow you to see if they are overtaking you in domain searches. You would also want to do this with your top brand terms and compare based on your competitor brand terms. ie. like for like.

Google Insights for search competitors
Google Trends for websites
Shows your search competitors and top keywords. Mostly used to find out your search competitors for based on keywords or to find out possible sites via the 'Also Searched For' listing. ie. any site showing up there might be worth considering to advertise on.



Example Site Comparison
http://trends.google.com/websites?q=cgb.ie%2c+carsireland.ie%2c+carzone.ie%2c+loadzacars.ie%2c+whatcar.ie&geo=ie&date=all&sort=2

Google Trends for Websites

Google Keyword Tool
Allows you to investigate potential search terms to target. Order results by competition and 'Local Monthly Searches' to identify good opportunities to capture low hanging fruit and gain some quick results.

Use the website search to identify terms linked to the website.

Use the keyword search to identify a mixture of terms to create new content around.


Google Keyword Tool Compeititors
Google Ad Planner
Shows traffic and profile information for sites that have signed up to AdSense, used as an additional tool to identify competitors websites ('Sites also visited'), related site keywords and audience.



Google Ad Planner DoubleClick
Google Ad Planner Placements

Google Website Optimiser
Once you have an understanding of your conversions (goals and actions), then it's time to play with website optimizer to see what page changes affect your conversions.

Google Analytics
Feature vs. cost Google Analytics is the definitive Web Analytics platform. The core tool to use for breaking down your site into defined actions.

segment traffic sources

define goals and track user actions

investigate visitor content interests

visibility on outcomes by sources


Google Webmaster Tools
Versatile tool!

Identify pages that target bad keywords

Investigate website problems with SEO

See what keywords bring traffic to your site

Google Webmaster TOols keywords associated to pages
iPhone Analytics App
Great program to view your analytics data on the go. Allows viewing of custom reports and juggling multiple Google Analytics account.



Google Moderator
Allows a group of people discuss items and give input on a particular thing - think website visitor surveys! and group feedback on products/services on a website.



Google Reader
Useful for tracking the top SEO sites and blog posts.




http://sivers.org/ - not SEO/GA related but very good all the same.


Google Richsnippets Tool
When your doing something on your site to enhance the Google search results pages, you'll be able to test that it's configured properly here. Any errors show up and are identified with steps to resolve the problem.

Things like
Google+ Profile Photos in search results

Star rating in search results

Lists




Google Rich Text Snippet

Google Suite of Tools
www.google.com/analytics/
www.google.com/webmasters/tools/
http://adwords.google.com
www.google.com/insights/search/
www.google.com/trends/
http://trends.google.com/websites
http://adwords.google.com/