In order to preserve the useful information and block websites, the white list and the black list come into being. As long as the keywords or URLs is added to the blacklist, they won’t appear on the website at all. Reversely, the contents on the whitelist can appear normally as usual.
Ili kuhifadhi habari muhimu na kuzuia tovuti, orodha nyeupe na orodha nyeusi hutokea. Maadamu maneno muhimu au URL zimeongezwa kwenye orodha iliyoidhinishwa, hazitaonekana kwenye tovuti hata kidogo. Kinyume chake, yaliyomo kwenye orodha iliyoidhinishwa yanaweza kuonekana kama kawaida.