A lace front wig has a sheer lace panel along the front hairline. Individual hairs are tied into the lace so the front can look like hair growing from skin.
What it helps with
Lace fronts are best when the hairline is visible, such as side parts, pulled-back pieces, or styles without bangs.
What it does not guarantee
A lace front still needs the right lace color, trimming, placement, and sometimes adhesive or grip.
Bottom line
Lace front describes the hairline construction, not the whole cap. It is a realism feature.