As has been said already, Castleford is a content farm where quantity trumps quality every single time. Writers are given ridiculously high targets which make it impossible to create original, well-written pieces of work. The focus here is unashamedly on writing for SEO - engaging writing doesn't even take a back seat, it wasn't even allowed in the car in the first place.
Whether anyone actually reads your content, or would even want to read your content, is of little consequence. What matters is that you repeatedly hit what's usually a narrow set of poorly thought out keywords in your articles. They also specialise in creating 'landing pages' for client websites that are often so poorly designed the landing pages are impossible to find, even for someone actively looking for them.
That's fine if your a young writer looking to gain experience - and the ability to write at volume and speed is certainly a worthy skill. Just be aware that working here will do little to develop any real creative flair or writing ability. It's the writing equivalent of colouring by numbers.
Additionally, the pay levels are unfairly low given the huge workload expected of writers, while the constant pressure to churn out upwards of 3,500 words a day means that often the only sound to be heard is the frantic hammering of 25 keyboards. Most people take lunch at their desk. Office atmosphere is more a concept than a reality.