An Airbnb revenue forecast is a month-by-month projection of occupancy, ADR and revenue for one property, set beside comparable listings. Buyers use it to test a purchase, operators use it to check an arbitrage lease, and hosts use it to set targets for a live listing.
What I plan around in Helsinki: Summer and Midsummer; Slush startup conference; Flow Festival in August; Ferry traffic to Tallinn and Stockholm. Guests I price for: European travellers on 2 to 3 night stays, tech and conference guests in November. Where I start: Summer and Slush premiums, winter floors, and housing-company rule compliance.
For Helsinki hosts I set up PriceLabs or Wheelhouse with summer and Flow bands, a Slush premium in November, short stays around ferry days and longer-stay offers for winter visitors, keeping Airbnb and Booking.com aligned so guests see the same prices.
The service in general is described on my airbnb revenue forecast page; this page covers how I apply it in Helsinki.