How to easily share media galleries in stories and campaigns
You could just share a link to one of your site's media galleries when you write a story or send a pitch/campaign, but a richer way is to use the media gallery bookmark feature from the green + embed menu in the editor.
Just type 'media g' with the + menu open to find the right option.
This lets you search across your media galleries (from your site or others), choose a gallery and insert it as a bookmark.
This inserts a nice clickable visual bookmark with an image, gallery description and number of images. You can adjust the orientation, and for more horizontal images choose a vertical layout.