Some people prefer gel eyeliners while some like kajals and pencil sticks. Both give different results so you should take your pick depending what you are most comfortable with and what suits you best.
Gel eyeliners give you a crisp, solid defined lines while kajals or eyeliner pencils are suitable for a diffused effect ideal for blending.
Applied properly, both can give outstanding results that will make your eyes more attractive. Moreover, you can apply them over just your upper eyelid or both upper and lower eyelid.
To apply gel eyeliner-
1. Take a fine eyeliner brush and put dots along the upper lash line to give the illusion of fuller eyelashes.
2. Fill it in making a smooth line and wing it at the outer corners only to elongate the eyes.
3. For a dramatic cat eye, line all around the upper & lower eyelid and waterline.