If you are reading a word wrong and like Tashkeel if it not on the detection algorithm, you manually place this mistake. Input your correct reading as the positive definition via voice once, and define if it is wrong then it always marks wrong unless confidence level is high and matches your custom mistake fixed

For Hifz this is useful as there are certain mistakes we make uniquely we realise and manually correct ourselves but the algorithm doesnt pick up like in beta mode tashkeel

Good if someone stops at a place they are not supposed to as well and they need to fix waqf places and other techniques like no ghunna on tanween 'an 'in 'un and you want to rectify it