What is strategic management and how does it affect the performance of Apple Inc. in 2017?

What is strategic management and how does it affect the performance of Apple Inc. in 2017?

Please note the following general points:
– Quality and depth of background research (i.e. range of sources used including books and journal articles and other sources, such as the internet, where appropriate)
– Demonstrated understanding of conceptual / theoretical issues
– Clear structure, style and argumentation
– Adequate documentation of sources, this includes referencing using a consistent, recognised method
– Presentation, essays must be typed, using line spacing of at least one and a half with adequate margins.
– Ability to meet the word limit, essays that are too long or too short may be penalised (plus / minus 200 words either way is acceptable)