We see so many people in the Bible, including Jesus, fasting at various times for varying durations. People like Daniel self-imposed dietary restrictions. Jesus went without food for 40 days. Paul's letters are rife with encouragement to pray and fast. But what for? What's the point of being hungry or going without?
The main goal of fasting is to decrease your dependence on the comforts of this world and increase your dependence on the nourishment and fulfillment of Christ.
In other words, fasting helps us cut the ties we have with the world - habits, addictions, comforts - so we can surrender ourselves more fully to God.
In that surrender, we find growth. In our weakness, we rely on his power. In our hunger, we grow an appetite for him.
Fasting is a discipline, which means it takes time to get good at it, and it's not easy at first. But as with any discipline, the more you purpose to do it, the more you see the benefit of it.
We recommend that you find an area of your life that you want to give up to God, and do without it. Maybe it's food, maybe it's certain foods. Maybe it's social media. The main goal is for us to build the discipline of doing without, so we can rely more fully on Christ.