The tradition in Spain (especially with the older generation) is to visit the cemetery to deposit flowers for the deceased and clean the tombstones thus honouring their loved ones. This is followed by a large family lunch or in some regions a "Castañada" which is a gathering around a fire to roast chestnuts and tell stories about the deceased to keep their memory alive.
This day is one of the best-selling days for florists throughout the year (together with Mother's Day and Saint Valentine's Day) which shows that the tradition is still going strong with the most popular flowers sold being carnations, daisies, roses, gladiolus, and chrysanthemums.