The writer was describing the times of the destruction of Jerusalem under the directive of King Nebuchadnezzar. He is praying to GOD about what is going on at the time. This was a dark and sorrowful time. He sees no light at the end of the tunnel and so he is looking for GOD to help. He wanted GOD to forgive them of their sins and to deal with their enemies. He wanted the load lightened. This reminds me of Psalms 70 where the writer is crying out for help. In this Psalm the writer is earnestly crying out and asking the Lord to help and forgive their sins. He says "Help us, and forgive our sins for Your name's sake."
Sometimes in our dark days "Help" is the only word we can utter. That is all you need. Know that GOD cares and He will deliver you. We can't forget what the Lord has done for us. The prophet Jeremiah was in a similar situation. He lamented and cried because doom and gloom was all around him but in the middle of the lament he recalled to his mind that the Lord was good. He said, "This I recall to my mind therefore I have hope. It is because of your mercies that we are not consumed because your compassions fail not they are new every morning, great is thy faithfulness. He remembered how faithful GOD was even in the midst of his trial, GOD still proved to be faithful. Hold On!!! You can make it. GOD will not let you falter. Be persistent in prayer and have a made up mind that you will live and not die and declare the works of the Lord.
Do not hold against us the sins of past generations; may your mercy come quickly to meet us, for we are in desperate need. Psalms 79:8
Help us, God our Savior, for the glory of your name; deliver us and forgive our sins for your name’s sake. Psalms 79:9
O God, the nations have invaded your inheritance; they have defiled your holy temple, they have reduced Jerusalem to rubble. 2 They have left the dead bodies of your servants as food for the birds of the sky, the flesh of your own people for the animals of the wild. 3 They have poured out blood like water all around Jerusalem, and there is no one to bury the dead. 4 We are objects of contempt to our neighbors, of scorn and derision to those around us. 5 How long, LORD? Will you be angry forever? How long will your jealousy burn like fire? 6 Pour out your wrath on the nations that do not acknowledge you, on the kingdoms that do not call on your name; 7 for they have devoured Jacob and devastated his homeland. 8 Do not hold against us the sins of past generations; may your mercy come quickly to meet us, for we are in desperate need. 9 Help us, God our Savior, for the glory of your name; deliver us and forgive our sins for your name’s sake. 10 Why should the nations say, “Where is their God?” Before our eyes, make known among the nations that you avenge the outpoured blood of your servants. 11 May the groans of the prisoners come before you; with your strong arm preserve those condemned to die. 12 Pay back into the laps of our neighbors seven times the contempt they have hurled at you, Lord. 13 Then we your people, the sheep of your pasture, will praise you forever; from generation to generation we will proclaim your praise. Psalms 79 NIV