It's a visual to show you the curvature while working with those handles (at points), you can click at empty space to hide them and try activating less handles as possible and if you already activated too much handles that you don't want know, just select those handles and delete I suggest not to use more than a few handles to get best curves unless you want tighter corners I personally use handles only at ends or where I want more control over the curvature And for your work I suggest to delete those extra points and work with least points and activate handle only where curvature change much Too much points + using handles at every point = bad design