Standard trainers stop your health bar from depleting. The 0101 Exclusive goes further. It prevents "ragdoll death" from falling or vehicle explosions. More importantly, it allows you to perform takedowns even when enemies are alerted—something the vanilla game restricts.
However, remember the golden rule of single-player cheating: Never use it online (Co-op mode), and always scan your downloads with Malwarebytes.
(v1.01 or similar), you can use third-party trainers, Cheat Engine tables, or manual file edits.