Your natural eyebrow hairs will continue to grow outside of the treatment area. This means that you will still need to pluck the occasional stray hair (depending on your own hair growth).
If you have rather lustrous and bushy brows, then you may have to have these shaped every so often. One benefit of the service is that is provides a perfect guide for touching up.
Speak to your provider if you have naturally light-colored eyebrow hairs and the pigment from your microblading is significantly darker to discuss periodic touchups.
Also, consider that dying may not be immediately recommended soon after the procedure as eyebrow dye can irritate the microbladed area.