The phrase "important gateway" refers to a significant entrance or access point that is crucial for reaching a destination or achieving a particular goal. Full definition
For a new college graduate, understand that student loans are the most important gateway to improving your credit score. (financialwellness.org)
Algebra is a tremendously important gateway course, but our success rates are not very good.» (sciencemag.org)
Yet dismissal, according to the memo, is necessary if the DOJ is to perform its «important gateway keeper role in protecting the False Claims Act.» (hueston.com)