It draws a comparison to the relaxing and pleasant experience of walking in a park, contrasting with tasks or situations that are typically difficult or challenging.
Here are some examples of how the phrase is used:
* "The test was like walking in the park. I aced it!"
* "With her help, the project was like walking in the park."
* "He thought winning the lottery would be like walking in the park, but it came with a lot of stress."
It's important to note that the phrase is often used ironically to exaggerate the difficulty of a situation. For example, someone might say, "This job is like walking in the park, but I'm wearing steel-toe boots and carrying a 50-pound backpack!"