Bash for loops simplify repetitive tasks by automating commands for lists or sequences in Linux.
Use for item in list; do commands; done to iterate through a list of items.
Use for file in *.txt; do echo $file; done to process multiple files in a directory.
Write loops like for ((i=0; i<5; i++)); do echo $i; done for numeric sequences.
Combine loops within loops for advanced tasks, like comparing multiple files or datasets.