Dab tsi yog banding?
Yog ib lo lus nug peb feem ntau tau txais, thiab peb txaus siab teb!
Banding yog txheej txheem ntawm ib lossis ntau cov khoom raug qhwv nrog ib daim ntawv nyias lossis zaj duab xis band. Nws yog ib txoj hauv kev zoo kom txuag tau ntawm cov khoom ntim thaum ntim, sau npe thiab / lossis bundling koj cov khoom.