Thanks for the question. I don’t need to use redshift very often within my work. This is mainly because the objects that I study are within our Galaxy, so the distances to them are quite small. This means that their redshift is really, really small, and it’s effect on our data is too small to measure.
As soon as you start studying objects in other galaxies, you need to start using redshift, and this allows you to shift your data so that it makes sense.
Let me know if you want anymore detail on this and I can look up some resources for you.