What is post-processing? It's an integral part of a digital photographer’s “process,” whether you're a professional or merely a hobbyist. This is where you edit your photos to balance hues, create special effects, improve saturation, remove blemishes, and more. These image enhancements and alterations can be done using special photo editing software.
There are many photo editing programs on the market. Like everything, each one has its unique advantages, disadvantages, and features. If you're still getting started as a photographer, our advice is just to keep it simple. You don't need the most advanced software on the market.
Reference: https://www.photoandvideoedits.com/blog/7-best-photo-editing-software-for-photographers
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