It was a gift which is nearly finished flowering. What do I do now? do they need pruning, feeding etc
When the orchid is done blooming you can prune away the old stems.
Your orchid will need a rest period now. You will need to water less, only water when the medium has dried out.
When new leaves began to appear you can resume normal watering and fertilizer schedule.
Repotting can be done after blooming if the roots are to large for the existing pot.
Here are some articles to help you.