Helps you to import slides, a PPT or even from your email. I can also export the slide

View helps you to change the view of the editing layout

Insert helps you to insert images, videos and audio. It also helps you insert others such as word art

Format only enables when you click on a text and images

The slide option helps you to add a slide, delete a slide, duplicate a slide and more

It helps to arrange the various things on your slide and arrange it in the proper way

Tools has options such as spelling, explore, linked objects and other

Now the add-ons section has add-ons which can help you with the slides your making. One example of add-ons is nearpod.

If you don't know where is a tool or you found it but you can't find it anymore, just type in the tool you want and if you find the tool you want, than click on it and you can use the tool like that.