Why do we do this? So if we have collection thumbnails on the front page they don’t show as blank or grey

How do we do this?
By going to admin/collectionsclick into

Click into each collection on the blue link.
And use the ‘choose image’ button to slect the image that you want to have as the ‘icon’ for that product category.

You've got that sinking feeling. Someone had placed an order on your Shopify store for $500, and somehow the total had come down to $10. Your first thought: you've been hacked.
You haven't. What actually happened is simpler, and luckily easier to fix. You had a discount code sitting in your Shopify account called "FREE", or something equally easy to guess. Someone at checkout has just ... typed it in. And it worked.
Here's what it means and what to do.
This is a stellar example of what happens when you consistently show up and put your genuine self into your content.
Writers and journalists are always looking for authentic voices, and if you're publishing regularly, you're infinitely easier to find. Read how Chris did it.