It’s something that’s going to be different per filament Ellis’ Guide has a good write up. I found with a 0.6mm nozzle I was getting ridges and stuff in the edges noted that it built up on the nozzle and then deposited blobs throughout the print. Reducing anything that can cause the nozzle to come in contact with material helps too, I use gyroid instead of grid because it doesn’t cross itself for example.
It was absolutely noticeable, I’m using Canadian Filaments - Carbon Capture PETG for reference. I’d also look at drying the filament if possible can help with stringing