I've just checked my site speed in Google PageSpeed Insights and it's come back as pretty poor. Particularly for render blocking resources. Please could someone let me know if the first (https://cdn.shopify.com/s/files/1/0460/5267/1643/t/3/assets/theme.css?v=8559711708498835681) is something specific in my theme? Or is it the theme as a whole? I can't find it anywhere in the theme.css file or the theme.liquid so I don't even know what it is.
I did think the v= could mean one of my product variations, but it's not returning anything when I try and search for it.
I'm using the Grid theme.