All our tasks certainly do matter to God. On that the Bible is startlingly clear: Whatever you do, work at it with all your heart, as working for the Lord, not for human masters, since you know that you will receive an inheritance from the Lord as a reward. It is the Lord Christ you are serving. (Colossians 3:23-24)
Whatever you do. Not some things you do, not 47% of the things you do, not the things you do in the Church, but ‘whatever you do’. And God would hardly ask us to do whatever we do with all our hearts, if it were not of some significance to Him, even if we ourselves may not think it significant at all.