What are Heuristics?
Heuristics basically are rules that when followed result in a solution.
Suppose there were no roads and you wanted to make your way, a heuristic might be:
1. Walk as far as you can.
2. Walk around any obstacle, if possible.
3. If faced with a mountain range, walk toward the space between 2 small peaks.
4. Repeat until reaching.
Does this heuristic give you the most efficient solution? No; however, it will get you where you want to go, and you won't waste a lot of time trying to make up your mind.