If free shipping is enabled customers will have access to free shipping on their orders. You can however specify a few conditions they must meet to be granted free shipping such as:
2) Minimum order amount
To Enable Free Shipping, select Enabled field as Yes and provide the required details.
1) Title: Provide the suitable title.
2) Method Name: Method name is Free by default. You may change it if required.
3) Minimum Order Amount: Provide the minimum order amount for which this Free Shipping method is applicable.
4) Displayed error message: Write the error message that you want to display in case of any error occurrence.
5) Ship to Applicable Countries : Provide details if you want free shipping for All allowed countries or for Selected Countries.