For every product on my shopify store, there is a statement that says "In stock! Usually ships within 24 hours."
How do I update that statement to reflect the actual time it takes which is 3 business days?
Great question. This could be showing up for a variety of reasons. This could potentially be a third-party app that you installed to show a processing time on your product pages. Otherwise, this would be a built-in feature within the third-party theme. In this case, what you can do is go into your admin > online store > themes > click the 'actions' button > select 'Edit languages'
From there, you can search for that text in the search field to find and replace it. Example shown below:
Let me know if that helps! If there is anything else I can help you with, please let me know.