A swoop bang is the go-to styling trick for wigs without a lace frontal — it gives a similar natural, off-center parting effect without needing any of the gluing, plucking or melting a frontal install requires.
The technique itself is simple heat styling, but checking the wig's fiber type first is the step that prevents a genuinely common and often irreversible mistake — melting a synthetic wig with the wrong heat setting.