Is the medium sized promo img (920x680, "large tile") ever useful?

[Zhi Yin]

So you could upload promo images in these 3 sizes: Small tile, Large tile, and Marquee. I figured the Marquee is used if your extension is featured at the top of Chrome App Store, but I don't see the 920x680 medium sized used anywhere at all. Is it used somewhere?

[Jaime]

Hi Zhi Yin

920x680 images are no longer used, they were previously used for highlights, but in the current Chrome Store UI they are no longer used.

Even so, it is always better to add them:

Why? 

- It doesn't cost much to add them.

- Google does not warn against future changes.

- Effect on rankings.

In the Brand Guidelines, it says more clearly:

Promotional images

Although only a small promotional image is required, you can also supply larger promotional images if you'd like your app to be featured more prominently in the Chrome Web Store. You can provide one of each of the following:

Small: 440x280 pixels (required)

Large: 920x680 pixels 

Marquee: 1400x560 pixels 

Promotional images are your chance to capture users' attention and entice them to learn more. Don't just use a screenshot; your images should primarily communicate the brand.

You will find more information here:

https://developers.chrome.com/webstore/images#promo

Good luck!