The big changes for SEO, made by Google now are now Keyword tool is replaced by Keyword Planner.
Now, lets see what change are make by Google
There is nothing new only keyword tool replaced by Keyword planner. All working criteria is now merged with in a single tool.
The external Keyword Tool is also no longer available. If you want to get keyword ideas using Keyword Planner, make sure to sign in to your AdWords account.
No match type data for search volume
With Keyword Tool, we showed you broad match statistics by default with the ability to get data for other match types, like phrase and exact match. But with Keyword Planner, you'll get historical statistics only for exact match. To decide what match type to use, add the keyword idea to your plan and review the traffic estimates for each match type. This change will help you get an accurate estimate of how much traffic you can expect to get with different match types. There’s quite a bit of overlap between broad and phrase match keywords, and the search volume statistic in Keyword Tool didn't take that overlap into account. Traffic estimates like click and cost do take this overlap into account, so checking those can help you decide which match type to use.
No device targeting
Keyword Planner doesn’t let you specifically target mobile devices, like tablets and mobile phones. By default, it targets all devices, which is in line with recent changes made to AdWords campaigns. We’re working on a feature that’ll allow you to get traffic estimates by device type and set bid adjustments for mobile devices.
Other changes in the data columns
In Keyword Planner, you'll notice several different data columns than those that you were used to seeing in Keyword Tool. Here are the differences:
Local monthly searches and global monthly searches:
These two columns have been replaced by the "Average monthly searches" column, simplifying the search volume data you can get. The average monthly search volume is specific to your targeting settings, and you can get data for an entire country or individual cities and regions within a country.
Note that you can still get global monthly search data by targeting all locations.
Ad share: This column is being replaced with a new column called ad impression share to help you look for potential impressions.
Google Search Network: This column has been replaced by the network option within the targeting settings. To get data for the entire Search Network, select the "Google and search partners" targeting option.
Search share: This column has been retired.
Approx. CPC (Search): This column has been replaced by the "Avg. CPC" column. You'll get more accurate data in the average cost-per-click column than you did in the approximate cost-per-click column.
Local search trends: This column doesn't appear in the Keyword Planner interface. However, you can still get search volume trends by hovering over the icon in the "Avg. monthly searches" column. You can also see these trends segmented by month when you download your historical statistics from Keyword Planner.
Extracted from webpage: This column has been removed from the Keyword Planner interface. However, you can still get the webpage the keyword idea came from when you download your historical statistics from Keyword Planner.
Note that you'll only get this data when you search for keyword and ad group ideas based on a URL, like a webpage on your website.
Article Source: https://support.google.com/adwords/answer/3141229?hl=en
