Your client will receive your invoice at the email address you provide for them. Upon opening the email they will have the option to "Review & Pay," clicking this will open the invoice in a separate window browser so they can review the invoice details.
Depending on the payment method you selected when creating the invoice they will see their payment options. If you selected Bank Transfer (ACH) your client will be able to see the details for your account that they can use to send you funds via a bank transfer. They will need to log in to their own banking platform to submit this ACH payment, using your account details provided on the invoice.
If you selected Credit/Debit Card, your client will be able to submit a payment directly from the invoice page by inputting their card information.
You can select either of these payment options when creating your invoices as long as you have set up a payment processor to process cards through your invoice settings.