Valentine's Day cards are special greeting cards exchanged on February 14th to express love and affection. They often feature romantic themes, such as hearts, flowers, and sweet messages. People give these cards to partners, friends, and family to show appreciation and care. These cards can be handmade or purchased from stores, and they come in various styles and designs. Many include heartfelt messages, poems, or quotes about love. Some people also enjoy adding personal touches, like drawings or photographs, to make their cards unique and meaningful.