How can I update the related products section on my website?

[lightwork]

My related products section is stuck showing the same 4 products underneath every product section. How can I fix this? My website is https://inspirelightwork.com/ 

It will allow me to change them all individually, but how can I get the search and discover automated recommendations to show instead?

[uiooo]

You need a shopify official APP: Search & Discovery 

[lightwork]

I have it