Complex sentence: It requires a company to narrowly define a particular audience by a particular characteristic, and tailor campaigns for that particular segment; this technique, though, can be more expensive due to customization and an inability to scale up in size effectively.
Split into simpler sentences: It requires a company to narrowly define a particular audience by a particular characteristic, and tailor campaigns for that particular segment. This technique, though, can be more expensive due to customization and an inability to scale up in size effectively.