Normally all golfers make some improvement. The full level of improvement depends on the amount of practice and the ability to perform skill to the automatic level.

Some golfers think that reading an article, or watching a video is enough to make a change. Rarely this is enough. To make significant progress takes some discipline and dedication - best results are seen in 2-4 weeks.

Unfortunately it is just not possible to make major changes and see results in 1 minute.