This article provides a comprehensive exploration of MEMS pressure sensors, with a special focus on piezoresistive sensors. It details the working principles, manufacturing processes, temperature compensation techniques, and practical applications across various sectors such as automotive, healthcare, consumer electronics, industrial automation, and outdoor activities. Additionally, the article clarifies the differences between piezoresistive and piezoelectric sensors and offers actionable advice on sensor selection, installation, calibration, and system integration, all backed by market trends and future insights for authoritative guidance.