The marbhna (death-poem or elegy) was among the most solemn compositions in the bardic repertoire, requiring mastery of the most complex dán díreach metres and a command of the conventions of praise and lament. A well-crafted marbhna could secure a patron's posthumous reputation and demonstrate the poet's highest skills. The tradition continued beyond the strict bardic period into later Irish-language verse, and its conventions — the address to mourners, the catalogue of virtues, the expression of irreplaceable loss — shaped the elegiac mode in Anglo-Irish poetry as well. The marbhna reminds readers that in the Irish tradition, poetry was literally entrusted with the preservation of the dead.

Marbhna is a formal elegy composed for a person of rank, preserving their reputation and lineage. It follows strict conventions of praise and lament, ensuring the deceased is remembered correctly. Poets use marbhna to affirm social values and historical continuity. It is a public act of mourning that reinforces community bonds. The marbhna demonstrates the poet's skill in balancing emotion with protocol. It is a key genre for understanding the social function of Irish poetry in memorializing the dead.