To press insert means to use the designated key on a keyboard to insert or add new text or data into an existing document or field. This action is commonly used when editing or updating information, and can also be used to replace existing text with new content. The insert key is typically located near the top right corner of a keyboard and is often labeled as “Ins” or “Insert”. Pressing insert allows for seamless and efficient editing, making it a valuable tool for writers, editors, and anyone working with digital documents.