This is the 3621st most frequent Russian word.
списки
"Spiski" in English means "lists."
In this sentence, 'списки' is used in its nominative plural form to denote 'lists' as a collection of items.
Я составил два списка задач на завтра.
I compiled two lists of tasks for tomorrow.
Here, 'списки' is in the nominative plural form and refers to written lists posted or displayed somewhere.
На стене висели списки участников проекта.
Lists of project participants were hanging on the wall.
In this example, 'списки' is a direct object in nominative plural form, referring to lists that require updating.