.data()

Store arbitrary data associated with the matched elements or return the value at the named data store for the first element in the set of matched elements.

.next()

Get the immediately following sibling of each element in the set of matched elements. If a selector is provided, it retrieves the next sibling only if it matches that selector.

.find()

Get the descendants of each element in the current set of matched elements, filtered by a selector, jQuery object, or element.