Idiom:

Pain in the neck ( something annoying )

Hit the book:

Niche

Differentiate

Hand-knit

Size up

Portal

Strike balance

General appeal

expertise

Find a niche. Knowing what product you want to sell is only part of creating a successful online store. You'll need to figure out what differentiates your services from all the other similar services people can choose, both in person or online. Why should a customer buy your hand-knit sweaters when they have 100 other online shops to choose from?