Need help with content locking

I'm targeting free apps on my website and when a person touches download it shows an offer. I don't know how to do that on Ogads and what type of offers should I prioritized first. Also, Any tips for me I'll highly appreciate it .

You mean in order for the person to get the free download he needs to complete an offer?

If so, just add the content locker script from OGads into your website code.