It is not good to go around publishing the good works we do with great fanfare, because everything we do must be for the glory of God and not for our pride. God does not share His glory with anyone.
When Jesus went through the provinces of the places where He exhorted the word of God He saw that when the scribes and pharisees helped someone they used to spread it in the streets of those provinces, and this is why Jesus says the following:
So when you give to the needy, do not announce it with trumpets, as the hypocrites do in the synagogues and on the streets, to be honored by others. Truly I tell you, they have received their reward in full.
We see this of to be praised oneself in many people, who praise themselves for the help they gave to a person in need. Helping others is good, but Jesus teaches us that when we do it, it is not necessary to publish it, since we have our reward for our good work.
But when you give to the needy, do not let your left hand know what your right hand is doing,
By saying “do not let your left hand know what your right hand is doing” means that the help we give to others is in secret, it must be something between God and you, and this is confirmed in the following biblical verse:
So that your giving may be in secret. Then your Father, who sees what is done in secret, will reward you.
God rewards in public those who help in secret. God looks at the work that man does in the world. But he also sees how bad man does. Do not vaunt yourself for the good deeds you do, but stay between you and God because just as you do good in secret, God will reward you in public.