# Auto-create custom link
Custom links in affiliate marketing provide a range of advantages, including personalization, improved user experience, higher click rates, and the ability to collect valuable data for optimization.
With the Auto-create custom link feature, you'll have the ability to effortlessly generate unique, customized affiliate links tailored to your affiliates on a large scale. No more manual tinkering or copying and pasting; this feature automates the process, putting the power of optimization and personalization at your fingertips.
## How to set up?
1. To activate Auto-create custom link, go to **Settings** > **Link & coupon** > **Custom affiliate link** and turn on **Auto-create custom link.**
2. Enter the provided variables from the below note into the **Link format** field so the system can generate corresponding custom links for new-registered affiliates. You can include other characters, such as letters or special characters to the field.
In this example, the link format has a variable **{first\_name}** and other characters like **\_** and **affiliate.** Therefore, when an affiliate named John signs up, he will receive get this custom link: **, just like the example underneath the **Link format** box.
3. If you want to generate custom links with the link format above for existing affiliates, kindly check this box and remember to press **Save** so the system can start generating for you. UpPromote will send you an email to inform you about a successful or failed (if any) custom link generation.
### Update Custom link
If you update the Default affiliate link for each program or modify UTM parameters, this changes the Affiliate link but the Custom link will not be updated accordingly and automatically.
In that case, you can click the **Re-sync links** button in the Custom affiliate link settings to update all custom links to follow the latest Affiliate link. We will inform you via the Notification center when the Re-sync process is done.
