What the 32 MHz Cortex-M0+ buys you in a low-power BOM
Peripheral set and connectivity — what is on the die
On the control side you get brown-out detect, POR, PWM, a watchdog timer, DMA, I²S, and an LCD driver — the LCD segment drive is unusual for this core tier and saves an external display controller in metering or panel applications.
The STM32L0 series is well-established, with broad distribution support.
Package and footprint — what fits the board
The surface-mount package is standard for two-layer boards and reflow profiles. The supplier device package is 64-LQFP (10x10).