Maximum Power Point Tracking (MPPT) is one of the most important enablers in the field of grid-connected photovoltaic (PV) systems. This paper provides an extensive literature review on various MPPT methods used for grid-connected PV systems. The review includes both conventional approaches and advanced optimization algorithms like intelligent control schemes and metaheuristics. The article highlights some of the recent developments in the field of MPPT methods for grid-connected photovoltaic systems such as the utilization of HOA to tune fractional-order PI controllers, which can achieve a rise time of 0.0073 seconds and power generation capacity of 100.72 kW , using PSO to achieve power extraction up to 7.5% higher than P&O with only 1.54% THD, and Second Order Sliding Mode Control that achieved convergence in 0.009 seconds with 76.29% THD reduction . The comparative analysis demonstrates that although conventional methods have the advantage of ease of implementation, advanced optimization algorithms outperform in terms of faster dynamic response and global maximum point tracking.