There is no compulsion on behalf of the editor to accept an R Pubsure certificate as proof of anything. However, it does two things: 
1) It shows that your manuscript has passed various language and technical checks and that it is in a state to be reviewed 2) It shows you care enough about your submission to their journal that you went to the effort of validating this in advance of submission. 
In the future, we hope that submissions with an R Pubsure Certificate will be sufficiently trusted to allow a bypassing of the checks we automate. This means that articles with an R Pubsure Certificate will be reviewed, and hopefully published, quicker than the articles without one.