Putin's hastily announced ceasefire was part of an information war aimed at discrediting Ukrainians. Since Ukraine could not meet its terms suddenly, Russia intended to leverage the hostile rejection of its unilateral truce to make Ukrainians seem unwilling to cooperate. Moreover, the ceasefire was a sham. It was the Kremlin's ploy to buy more time to replenish and rearm its forces and move more soldiers to the front lines.
Putin's declaration of a truce was significant as it was the first time either side had used the language of peace since the start of the full-scale invasion. Despite Ukraine's allies pledging to send armored vehicles, Russia offered a hand of Christian mercy to Ukrainians. The truce offered a glimmer of hope, which Ukraine shrugged off promptly. It is clear to Russians who they're dealing with and ensures that future opportunities for deception don't creep in.