By quantifying search volume (search engine queries) for specific keywords and uncovering related keywords, a marketing team can plan better search campaigns that drive interested prospects. Other useful search metrics include the ability to segment and target by geography (country or even city), time period, language, or by industry.
Google Trends - google.com/trends
Provides the ability to identify the most popular search trends and quickly filter based on consumer interest and demographics.
Youtube Trends - https://www.youtube.com/trendsdashboard
Youtube is the most popular video destination hub on the web. It is also the second largest search engine. Youtube Trends is a great tool for marketers, as they plan to incorporate video, social video and sharable media into their campaigns.
Google Adwords Keyword Planner - adwords.google.com > Tools and Analysis
Keyword Planner is a free tool for planning new search engine marketing campaigns or expanding existing campaigns. The tool allows for the ability to search for keywords and find new PPC ad group concepts. You can also get recommendations for keywords that perform well, and get traffic estimates. Great for planning competitive bids and budgets for PPC marketing campaigns.