Snowflake is a cloud-based highly scalable database (see http://www.snowflake.com for more information). Snowflake acts muhc like a standard SQL database with respect to how one interacts with it, and therefore importing Snowflake data is much like importing data from other SQL databases in LityxIQ. See https://support.lityxiq.com/096794-Import-Data-from-a-SQL-Database-Table for more information.
Note that when setting the connection settings for Snowflake connections, you are required to enter the Compute Warehouse name from your Snowflake account. See Snowflake's website or your Snowflake account for more information on compute warehouses.