marketing strategy is not as simple as it sounds. it involves a lot of research of the markets you are targeting, a lot of pre-planning and decision-making. the strategy might have to be changed with changing market sentiments in which one needs to be constant touch with. this can be termed as post-planning.
the best way to make sure your business strategy meets your customers needs, you should realise a online market research.
you can check it here, whatever country you want to run you market research on.