Summoning points

From the RuneScape Wiki, the wiki for all things RuneScape

Summoning points are related to the Summoning skill level. When summoning a familiar, the Summoning level is reduced by the Summoning point cost for that familiar. While familiars are summoned they drain summoning points slowly over time until the player's summoning points reach 0, similar to when a prayer is used. However, the familiar is not dismissed when the player's points reach 0. It will stay summoned and can perform all of its normal activities except for right-click abilities. When your familiar's timer runs out, you must recharge your summoning points to summon another familiar.

Additionally, using right-click abilities on a familiar will drain a certain number of summoning points when activated (ie. Flames ability) unless there are none, and in that case the ability won't work. (Do not confuse right-click abilities with Summoning scrolls, which do not drain summoning points when used.)

Similar to Prayer points, Summoning points can be regained by visiting a Summoning obelisk, Small obelisk or by drinking a Summoning potion(s) or a Super restore potion(s).

The amount of points remaining appears next to the Summoning icon on the minimap and in your skill levels list.