Https:// i dont able to understand

honestly i have no idea what’s going on on this web page , previous pages i have practised alot and luckly i got no problem , faced no difficulties , never use the help of solution box before but in this page 7. Adding Hyperlinks i have no idea what’s going i use solution button alot and tried to compare but still not able to get it .
i really need help , i don’t want to move with help of soulition button , i want to learn it at my own , please any body help me …it was fun to me to practice but now it’s getting really tough .
help me…