Hence, articles should be tailored to suit the target audience's taste. ... An article's ending should be out of the box, something that leaves the readers thinking or calls for action.

Should article writing be in a box?

An article is not enclosed by any box. Articles are not written in boxes.

Is it necessary to keep a notice in box?

Since notices are fairly brief it is best to keep it simple. Use passive voice as far as possible. Present your notices in a proper format in a box. The presentation should be neat and thus be appealing to the eye.