Presentation skills are the abilities you use to share ideas with an audience clearly and confidently, in speech, slides, and body language.
In a meeting, you explain three points in order, look up from your notes, and keep each slide short. That is presentation skills at work.
At work, presentation skills show up when you brief your team. Someone stops you with a question halfway through, and you answer it briefly, then pick up where you left off without losing the room. Handling that moment smoothly is part of the same ability.
In class, they show up when you present a project. You swap technical terms for plain words because your classmates know little about the topic. Same ability, different setting: you adjust how you speak to fit who is listening.
People sometimes mix this up with public speaking. Public speaking is one setting, like giving a talk on a stage. Presentation skills cover any situation where you present to listeners, including a small team meeting or a class project.
The term is an umbrella that groups smaller abilities. Two quick examples: audience interaction, like pausing to ask if a step made sense before moving on, and brevity, meaning short sentences with no filler.
So the term covers many separate skills, and knowing it means you know the whole set rather than any single one, such as asking the audience questions or keeping sentences short.