By default when you enter a sku reference in quick search bar of Magento 2 , the system displays as result all the products whose sku is having prefix of entered sku, this extension allow you to fetch only the sku which you have used in search field bar. . In demo we have sku 24-MB0 24-MB03 24-MB05 ... you can making search with 24-MB0 and you will have just 1 result even is prefix of all other sku's