Focus on the pronunciation of filter
English definition of “filter”
/ˈfɪltər/ verb [T] IT
› to use a computer program to process information before displaying it or preventing it from being seen: The company, whose products filter email and internet content, confirmed a record second quarter yesterday. filtering noun [U] › Email filtering is the removal of unwanted email, for example spam or a phishing attempt, before it reaches your mailbox.