• `static`: the default
• `relative`: allows you to nudge around with top/right/bottom/left, making z-index work, gives you a positioning context
• `absolute`: top/right/bottom/left moves the element to that exact position, otherwise the same as relative
• `fixed`: Like absolute, but scrolling the page doesn't move the element
• `sticky`: Like fixed, but it doesn't become fixed until the page is scrolled past your set threshold