A: Hi NikosGallis,

Your campaign preview credits let you test the following before sending your campaign:

a) Spam test, to verify the delivery potential of your email.
More info here: https://en.soporte.acumbamail.com/article/233-test-spam

b) Preview your template in different browsers and devices.
More info here: https://en.soporte.acumbamail.com/article/65-crear-campana-clasica#paso5

I hope it helps.

Best,

Alicia