You must have purchased a license for Insights Direct Connect.
Download and install Qlik.
After you have established your Direct Connect account, our Support team will provide you with:
Connection String and Warehouse Name.
Website link to set up your credentials to Snowflake. Before you complete the connection to Snowflake, make sure you follow the link and set up your credentials.
Snowflake Direct Connect
After you have completed the prerequisites, you can set up the connection to Snowflake.
For the instructions, refer to the official documentation from Qlik: