the NGS method, how does it work. break into down into 4 steps, not long explanation.Like couple of words please and explain what happens in each of thme very short

1. Library preparation: DNA is fragmented into smaller pieces and adapters are added to each end.

2. Sequencing: Fragments are sequenced using high-throughput sequencing technologies.
3. Mapping: Sequenced reads are aligned to a reference genome or assembled to generate a consensus sequence.
4. Analysis: Data is analyzed for variant detection, gene expression, or other specific purposes.