###A call to action is often used to get a user to commit to a particular path, oftentimes a conversion or sale. (Proceeding to a future task; i.e. a Sales Funnel)
A call to action is often used to get a user to commit to a particular path, oftentimes a conversion or sale. (Proceeding to a future task; i.e. a Sales Funnel)
They are often spoken of in the context of marketing & sales.
For instance, on a homepage for a product:
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The example you refer to sounds like it's inside of a process (flow) they've committed to from a previous link or button.
Do you have a step through with descriptive headers showing the steps? In that case the user can see if they are on the last step, with the final button the action to complete (the submission of the form).
'Confirm' can be a confusing term. I'm not sure what your domain is, but you can be more explicit on the final step where once they push the button, their card will be charged: in your case Make Payment
or Place Order
is an explicit final action.
That final action is crucial, but CTA's are often referred to as the Action (button or link) that set them into this process you're describing.