To set up Stripe Payment go to Classified Listing=> Settings => Payment=> Stripe Settings
If you want to use Stripe payment, you first need to Enable it by checking the “Enable Stripe” box then filling in the necessary fields.

3.4.1) Enable: To enable Stripe payment, mark the “Enable Stripe” box as checked.
3.4.2) Title: Provide the title that will be shown as the payment name during the checkout process.
Description: Write a description that will be displayed during the checkout process.
3.4.3) Test Mode: To enable test or sandbox mode check this option.
3.4.4) Publishable & Secret Key: If you enable Test mode, please enter the Test publishable key and Secret key. If Test mode is unchecked, then enter the Live Secret Key & Live Publishable Key to configure your payment gateway. You will get these settings in your stripe account see here.
3.4.5) Inline Credit Card Form: To enable inline Credit Card option check this option.
3.4.6) Statement Description: Please provide a brief description here so that customers can easily recognize the payment.
3.4.7) Captcha: To captcha the payment immediately enable this option.
3.4.8) Enable Stripe receipt only: If checked will send stripe receipt email to billing email in live mode only
3.4.9) Saved Cards: If enabled, users will be able to pay with a saved card during checkout. Card details are saved on Stripe servers, not on your store.
3.4.10) Force 3D Secure: If Force 3D Secure is enabled, 3D Secure will be forced for ALL credit card transactions.