Pips are small but easily countable items. It is used to describe the dots on dominoes, dice, denote suits, and is the name for the seeds of fruit. It could be used as a synonym for dot in most situations, for example morse code.
In playing cards, pips are small symbols on the frontside of the cards that determine the suit of the card. A standard 52-card poker deck consists of four suits of thirteen cards each: spades, hearts, clubs, and diamonds. Each suit contains three face cards - the jack, queen, and king. The remaining ten cards are called pip cards and are numbered from one to ten. (The first card is almost always changed from "one" to "ace" and often is the highest card in the game, followed by the face cards.) Each pip card consists of an encoding in the top left-hand corner (and, because the card is also inverted upon itself, the lower right-hand corner) which tells the card-holder the value of the card. The center of the card contains pips representing the suit. The number of pips corresponds with the number of the card, and the arrangement of the pips is generally the same from deck to deck.