Google Slides is essentially Powerpoint but as it is part of Google Suite you can do so much more in terms of collaborations. Here are some ideas:
Use to make a good old fashioned presentation
Get students to make a presentation
Make an interactive lesson hyper doc (see below)
Make interactive activities using Pear Deck - Click here and Click here
Create an interactive choice board - Click here or Click here
Create a project by creating templates students fill in - Click here
Create a digital worksheet that students can complete from a PDF - Click here or Click here
Create a board game style lesson - Click here
Create a digital notebook for students - Click here
Make drag and drop activities - Click here or Click here
How to use Google Slides from start to finish!