A survey uses the same code used for your feedback widget using the same Global Access Token. If you've already installed the widget on your site, you don't need to complete this step for surveys.
Open the survey's builder (Edit Survey from its Overview tab) and go to the Install tab. Or from the left nav click </> Install Code
Choose the Global Access Token from the dropdown, or select a specific site token.
Pick your framework from the grid: npm, React, Vue.js, Next.js, Angular, iOS SDK, Android SDK, or React Native.
Follow the snippet or setup steps shown for that framework and add it to your codebase.
See: Install Userback Code from the docs site for full installation instructions.