Can someone please explain what is (this came from my HW Case?

At the front of your island there is a lighthouse. Click it and do the upgrade then watch the ad to complete the next one. Tomorrow come back and click the lighthouse again and repeat your renovations. Each day one renovation can be done and a second renovation can be completed by watching the ad.

It takes a lot of renovations to complete the lighthouse.

First landmark is the Lighthouse. Every time you fill one of the bars to green, that is one renovation. You can fill 2 bars every day if you watch the video ad. So your HW case will take you at least 2 days to do 4 renovations. You can renovate as early as every 20 hours.

There are 5 landmarks and they must be completed in order one by one:

Lighthouse = 141 days = 4.7 months (based on renovating every 24 hours)

Chapel = 171 days = 5.7months

Pirate Ship = 190 days = 6.3 months

Mountain Chateau = 228 days = 7.6 months

Aviary = 60 days = 2.0 months.

It will be faster if you renovate every 20 hours.