Congratulations! You have been shortlisted or offered a job opportunity.
When you receive a job offer, you typically don't want to say "yes" and take the job on the spot. Even if you are certain that this job is for you, it takes quite some time between your application, through all the recruitment process and receiving an offer - therefore, always take the time to evaluate the offer to be absolutely certain that the position is right for you. Be sure to emphasize your gratitude and your interest in the offer, and then ask for a day or two to think about the offer and whether you have any questions or need further clarification.