Strangely, if you did that on a MacBook Pro keyboard, the cursor will just move to the left. On a Windows keyboard, when you want to use the Delete key to delete a character, you would normally place the cursor to the left of that character and press the Delete key. Once you get the hang of it, it can really help you get more things done. Siri uses artificial intelligence (AI) that enables it to learn more as you keep on using it.
Once launched, Siri can start responding to questions/requests, like: