Pens and pencils (including mechanical) are versatile writing media that can be employed for taking notes, drawing, sketching, etc. Comparing pen vs pencil, it is not easy to say what is better. The use of each type of instrument in a certain situation doesn’t always depend on the user's preference. There are cases when the use of a particular tool is highly recommended or even mandatory. If you are curious what these cases are, read the review https://wowpencils.com/pen-vs-pencil/ that highlights the advantages and disadvantages of each medium, and describes the spheres of their preferable utilization. 

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0:23 Pros and Cons of Pencils
2:16 Advantages and Disadvantages of Pens
3:34 Using in Different Situations
3:52 Writing
4:58 Taking Notes
5:28 Drawing
6:15 Sketching
6:53 Conclusion