Renaming is an excellent first step when you create a presentation. "Untitled presentation" just isn't as compelling as it used to be.
Here's how to rename your presentation:
Open the web app and find the presentation you want to rename. Click 'Edit' under the current title to open the Editor.
Note: If you just want to rename your presentation, you can skip straight to it by clicking 'More' and selecting 'Rename' instead.
At the top of the Editor, you'll see the current title of the presentation beside an icon that looks like a pencil. Click this to rename your presentation.
In the pop-up box, give your presentation a show-stopping name and click ‘Save’.
Don't forget to publish your changes so everyone can see your awesome title!