If our moon had less mass, how would tides be affected and why

The tides would be lower,because the moon when revolving also magnified by the pull of the sun makes the tides rise, if the moon had less mass then not only would the tides be lower, but the magnification that the sun gives to add on the moons pull would also be less.
If you don't understand last sentence--> ex: Say that the moon has a 1.5x pull on the tide which gives it 1.5x pull and the sun's pull magnifies it even larger to say 3.0x the combination of force makes the tide even larger when not only the suns pull is on the tide but the moon also.

Tides would not be as great as they are because the moon's mass, and therefore its gravitational attraction toward the Earth and irs oceans, is what creates the tides, If the moon's mass were significantly less, the tidal changes throughout the day would be less noticeable.

The gravitational effect of the Moon (especially including the tides) is proportional to the mass of the Moon, so the tides would be less.