Hope following suggestions will help you
Hi there! Maggie, Shopify Expert here
The homepage looks very inviting and engaging, so great for conversion. I absolutely love the name and you seem to have defined branding and the target customer, which is important.
The "Sign up and Save" pop up is quite persistant and shows up on every page, even after closing it a few times. I do recommend tweaking the settings a bit - so the pop up doesn't appear again after closing [you can do it within the app behavior settings]. Otherwise you will annoy your visitors, and Google also doesn't favor websites with large pop ups covering the screen, as they affect the user experience [UX] which is important when ranking websites.
I also recommend working on the product descriptions. Some items like this: https://thepunchypaint.com/collections/new-arrival/products/beavant-o-ncek-hollow-out-knitted-sweate... [hell of the URL you got there btw - I'd optimize these too], there is no description at all, just a size chart and the sizing guide. Make sure to write descriptions to tell visitors about the product, the fabric, style, fit etc. That plays a huge role when buying a product.
Also check for the typos across your website, the product above should really be "O neck" not "O ncek"
Here are a few guides that might help:
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Rock Paper Copy
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