what should be included in .ppt of project work

There is an old adage about giving presentations:

1. Tell your audience what you are going to tell them.
2. Tell it to them.
3. Tell them what you have told them.

So in point 1 you would give an introduction to the project and a brief overview of all the sections you are going to talk about. In point 2 you give the details of each section and how it connects to its predecessor and successor. And in 3, you recap what those sections are. It is up to you to decide how many parts you need to break it down into.