The phrase "low barrier" means that there are few obstacles or limitations to do something. It implies that something is easily achievable or accessible with minimal effort or requirements. Full definition
This seems like a business with low barriers of entry and where returns depend highly on management. (longtermvalue.wordpress.com)
With fewer of the larger players operating in the digital space it is a comparatively lower barrier for entry and offers greater bang - for - your - buck efficiency. (fooddrink-magazine.com)
With lower barriers then most other margin trading services it should be very attractive to new traders. (bitcoinist.com)