The phrase "certain applications" refers to specific uses or purposes for something. It suggests that there are particular ways or situations in which something can be used effectively or appropriately. Full definition
It is a sales role but requires considerable technical knowledge to provide recommendations on specific products for certain applications. (targetjobs.co.uk)
It is also used in certain applications for construction. (americanhardwood.org)
It works fairly well, keeping in mind how often you use certain applications in multiple locations. (androidauthority.com)