What is the difference between a pad and a liner?

Pads are designed for use during your period

Pads are designed for use during your period; they are made of absorbent material which soak up the menstrual fluid to ensure you feel fresh and clean. They are available in different thicknesses and absorbencies for each stage of your period. Liners are similar to pads except much thinner and smaller, these are designed for use in between your period, or when your period is light. A slight vaginal discharge in between periods is perfectly normal and something U by Kotex® Everyday Freshness Liners can protect your favourite undies from.