IBM SPSS is a software platform that offers advanced statistical analysis and machine learning algorithms, text analysis capabilities, open-source extensibility, integration with big data and seamless deployment into applications. The software is accessible to users of all skill levels due to its ease of use, flexibility and scalability. You can download the software from the IBM Marketplace by signing in with your IBM account (also known as IBMid). A step-by-step guide for downloading, installing and licensing SPSS Software can be found on the official website.