To make room on your farm, you must clear weeds, trees, and other rubble. Tap on the item you want to remove.
Then, tap on the Farmhand who will carry out the task.
The rewards and the amount of time it will take to complete the task will be shown. You will also see the materials needed for the task.
After completing the task, tap on the reward to claim it.
Related posts:
FarmVille 3: What are Achievements?
FarmVille 3: How do I use the Building and Decor Shops?
FarmVille 3: How do I cook and craft?
FarmVille 3: What is Happiness?
FarmVille 3: What are Pets?
FarmVille 3: How do I unlock or upgrade Farmhands?
FarmVille 3: What are Decoration Coins and how do I earn more?
FarmVille 3: How do I expand my Farm?
FarmVille 3: What is the Market Stand?
FarmVille 3: How do I see my Followers / Likers?