From Activity 1, the mail has 'It's really good to be here and I'm enjoying myself. It's a good time of year to come to this place because it's not tourists crowded now.' 'It' is used for describing a situation or condition.
Class 6 › English Grammar and Composition › Chapter 7: Introductory 'There' & 'It' › Topic: Understanding the use of 'there' for existence, events, and quantities
Aligned to the NCTB national curriculum.