Keyword Planner replaces Keyword Tool
For many webmasters the Google Keyword Tool has been the foundation of keyword research and planning for a number of years. This tool enabled webmasters to determine keyword volumes, ascertain any opportunities available, monitor seasonal trends and forecast a return on what these keywords could deliver in terms of visits and revenue.
This month Google has retired the Keyword Tool and replaced it with the Keyword Planner (they had previously announced this would be happening). The Keyword Planner has some differences in the way it counts search volumes - and there appear to be a number of bugs with the tool at present.
Whereas with the Keyword Tool you could drill down to show search volumes per platform (i.e. desktop and mobile) the Keyword Planner bundles all of these into one pot - meaning that the volumes from the Keyword Planner are often higher than those from the Keyword Tool - however, there are currently some anomalies within this system.
The Keyword Planner does offer a few features that were not present in the Keyword Tool. For example, for those working in local search niches, there is now better geographic segmentation, including the ability to bundle geographic regions. Also, there is now a useful bulk upload feature, where up to 10,000 keywords can be uploaded for analysis. The Keyword Planner can display search volumes by ad group, landing page and any other categorization set by the user.
It's likely that Google will be tweaking the Keyword Planner tool going forward to iron out some of the bugs, increase stability and enhance its feature set, as it is still relatively early days in its life cycle.