What are the best ways to improve Shopify store speed without paid apps?

I’ve been working with Shopify & Magento stores and noticed speed is the #1 issue affecting conversions.

Some simple tips I’ve seen work:

• Compress images (TinyPNG / WebP)

• Use a lightweight theme

• Minify CSS & JS

• Enable lazy loading

Curious to know — what’s worked best for your store?

(P.S. If anyone wants, I also offer a free ecommerce audit to spot performance issues.)