The first month is free, and it will be deducted at the end of the second month. This kind of free use+automatic renewal+deduction is a common practice of American Internet companies.
Automatic renewal is also stated in the terms of service, that is, there will be terms that need to be read when you agree to try it out.
A common-sense problem involved here is that if a company asks for credit card information when providing a trial service, it will usually automatically renew the contract and deduct the money after the trial period ends. At this time, you should be careful, such as setting a calendar reminder at the end of the month and applying for cancellation of the trial.