SharePoint Composer enables you to visually design your SharePoint configuration, from a multi-farm configuration to a single server configuration, all the way down to the web application level.
If you have an existing 2007 implementation, you can begin the design process by importing/crawling your current installation. You can then instantly document this installation, including all configuration settings, by saving the imported information to a Microsoft Word document. Using the validation tool, you can identify issues with your current configuration and further refine your design.
If you are starting out with a new SharePoint 2010 implementation, you can begin by using one of our best practices design templates that is applicable to your specific scenario. These templates are the result of painstaking research on the part of our SharePoint MVP's and Senior Architects. Using Composer, you avoid countless hours of research, trial and error.
Once you make changes to your existing design or the design template, Composer's validation tool will point out any potential issues with the configuration and provide best practice advice for your new design. When the design process is complete, you can rest assured that your SharePoint 2010 implementation will be in accordance with best practices.