Showing the number of enrolled students as part of my marketing strategy?

Hello! 🙂
I saw somewhere someone adding under their course’s headline “trusted by 2000+ students”.

I’m also selling an online course and I thought of adding it too since I sold it to more than 300 people.
Is it recommended or not? What are your thoughts? Does it look credible or not enough students?

Sorry, it’s not too much of a coaching question!
Thank you!!