If you're living off the land IRL, you forage and take what nature gives you, and it's important to recognize safe plants, fungi, etc. you can use because you can't go shopping.
In cybersecurity, the concept is that it's easier to go undetected or just get things done if you're a hacker if you can use apps that are already installed on the system versus installing new systems, which will often raise red flags or be locked down. So you learning to see if target system already has GroupChatApp installed and if so, it lets you escalate permissions in a way that otherwise you couldn't do.
In cybersecurity, the concept is that it's easier to go undetected or just get things done if you're a hacker if you can use apps that are already installed on the system versus installing new systems, which will often raise red flags or be locked down. So you learning to see if target system already has GroupChatApp installed and if so, it lets you escalate permissions in a way that otherwise you couldn't do.