A PPTX file is a presentation created with Microsoft PowerPoint 2007 or later. It contains a series of slides, which may each include formatted text, images, videos, and other types of media.
About Microsoft PowerPoint
PowerPoint is a widely-used program for creating presentations and slide shows. It includes several master templates, which can be used as a standard theme for each presentation. Users can modify aspects of the template design or may alter individual slides if needed. Slide layouts can also be built from scratch if needed. PowerPoint is commonly used to create business presentations, but is also a useful tool for creating lecture notes and personal slide shows.