Title Pages in PowerPoint:
PowerPoint presentations commonly have a title page with Title and Author information. It is also very easy to unobtrusively include on this slide date and other version information, such as where the presentation was given, the audience, or what version of work the presentation refers and so on. This is important if your slides may become publically available on your own website or in a repository along side other related pieces of work, so that it can be identified within the context of the body of work it comes from.
File > Properties:
The properties fields available in PowerPoint are the same as those available in Word and Excel. Here is a blank example:
Recommendations:
The project recommends using these properties fields whenever
possible, to make sure that the object itself contains enough
information about itself to always be identifiable.