There are a few newer features added to Gmail in the past year or so that can be annoying to some, helpful to others.
One newer feature is called Nudges. Do you forget to answer emails? Gmail can nudge you now to answer the email. I had noticed there was an older email (4 days old) that I wanted to wait to answer. All of a sudden the email was at the top again. In the subject line there was orange print that said “Received 4 days ago. Reply?” You can choose to reply or even “snooze” the email. If you snooze it, it will go into a new folder called “Snoozed”. This can be enabled or disabled in Settings.
“Smart Reply” is another newer feature. The first time I saw it, I was a little confused because I hadn’t read anything about it. These are the words that show up at the bottom of an email that allow you to choose a canned response. For instance, based on words in the email (yes that’s creepy), I’m looking an email that ends “How’s that sound?” and the canned response choices are: “Sounds good to me.”, “Sounds like a plan.”, and “Sounds great!” So I could choose any one of these quick replies. I can usually tell when I’ve gotten one of these from somebody. These Smart Replies can be enabled or disabled in Settings. This picture shows the instructions for disabled from your iOS device.
Another newer feature is the “Hover Actions” where you can hover over the email list and delete or label while in the list. This action can be enabled or disabled in Settings.
You can now add a split view to Gmail where you can see the list of mail on the site and a pane with email to the side or top of it (horizontal split or vertical split). If you have a wide screen, it makes it nice to work with.