Click on Import Account on the main page of the Lite Client.
You will be forwarded to the following page.
Copy and paste or write your SEED into the blank text field - the Lite Client will automatically return the corresponding address right below the text field. If you entered the correct SEED, it will display your Waves address. Then, click on Register, assign a name to the account (optional) and set a password for encryption of the SEED. To finish the process, click on Register again and you are forwarded to the user interface of the Lite Client.
For more information about seed phrase, please see the next article - What is a SEED phrase of your account
Customer support service by UserEcho