How do I promote ClickBank products without spending money?

For promoting click bank or any affiliate product you can use different strategies such as:-

1) create a niche blog and write in-depth and problem solving article for people and drive some traffic and promote your link there.

2) create a YouTube video related to your affiliate product and share your opinions about that product and tell people to buy products from your description.
3)Or create any social media groups and try to build targeted audience there and promote your products there.

Above all are free method to promote any affiliate program.

But my recommendation is to create your own blog or YouTube channel and promote your product there…

If you are looking to promote clickbank without spending money have a look at this online community that will teach you how to build niche sites to make money.