Custom CMS block displayed at the left sidebar on the Catalog Page. Put your own content here: text, html, images, media... whatever you like.
There are many similar sample content placeholders across the store. All editable from admin panel.
What's Lightroom Presets ?
A preset is a configuration of settings, designed to achieve a certain look or style of your photo. With just one click on a preset, your photo can be altered to have a film look or to achieve the tones you desired.