  Efficient quantum sensing technologies rely on precise control of quantum
sensors, particularly two-level systems or qubits, to optimize estimation
processes. We here exploit the Quantum Zeno Effect (QZE) as a tool for
maximizing information obtainable by quantum sensors, with a specific focus on
the level avoided crossing (LAC) phenomenon in qubit systems. While the
estimation of the LAC energy splitting has been extensively studied, we
emphasize the crucial role that the QZE can play in estimating the coupling
strength. We introduce the concept of information amplification by the QZE for
a LAC system under off-resonant conditions. The proposed approach has
implications for AC magnetic field sensing and the caracterization of complex
systems, including many-spin systems requiring the estimation of spin-spin
couplings. Overall, our findings contribute to the advancement of quantum
sensing by leveraging the QZE for improved control and information extraction.
