These tutorials refer to the "recommendations" Liquid object. This can be only added to a product template, and shows recommendations similar to the product.To add such a section to the cart page, there's two options:1. Pick a random product out of t...

@joshuarowley42 the order confirmation email is sent once an order is created. There's also a Shipping Confirmation email. These are in Settings > Notifications.If you added the code from the invoice template, to either one of these templates, the in...

Invoice is a template in Settings > Notifications > Order Invoice To automatically send an invoice, and depending on which event should trigger it, you can just add the Invoice code into the order email (e.g. Order Confirmation).

A link or a simple bar that says "This site uses cookies" is not compliant, since the user must explicitly opt in to each cookie category.When it comes to cookies though, Shopify has an option to limit tracking. I don't know if it is on by default, b...

I'm not sure what can slow down the checkout page on every different store, but I suspect it's an asset that's blocking the page load. It could be a payment option's JS code, for example.The first step is to open the Network tab in the DevTools and l...

secure_customer_sig and secure_session_id are both HttpOnly cookies.Javascript cannot access them.And they are set by Shopify's servers, but the theme can't do anything about them.It seems the only way to allow users to be logged in for a longer amou...

@brianna4812 You have the Debut theme. I think the function that's throwing is not a part of the original Debut file. It's probably an app that you've installed (Booster?).There's some wrong handling there but it needs further investigation. 

Here's an overview from this article. 

Shopify actually creates a new silent variant when you create a product.This can be found with their API with a simple query, but they could have included an easier way to access ids like that in the dashboard, for non-developers.Keep in mind, in the...

They can read the referrer header or your request's IP and keep track. If they get too many requests, thy return a 429 code and you need to get an API key from them.

I recommend SmartrMail or Justuno if a simple newsletter popup is needed, especially if you want to avoid slowing down your store.

Sometimes HTML like this gets created with JavaScript, in which cases there might be a script that creates the popup. The script could be in theme.liquid, and you can search for e.g. "mailchimp" in case it's in that file.If it's external, it's a bit ...