At first, please get Sneeit Licence key for your website. Please login to Sneeit and access:
https://sneeit.com/author/your_sneeit_username/?tab=licenses
Now, input your website into Your Website URL field, click Submit Website button. After that, you will see your website is being listed in license Your License Keys list, so you just need to copy the key under your website domain.
Return back to your WordPress admin dashboard, select Appearance > Theme Activation then pasting both your username and license key into required fields.
Finally, click Validate Now button to apply.
If your information is correct, you will see successful message and get update notification each time we release a new version of your theme.