Filtering allows you to focus on the exact sets of data that you are interested in reading. As you have seen, Wireshark collects everything by default. That can get in the way of the specific data that you are looking for. Wireshark provides two powerful filtering tools to make targeting the exact data you need simple and painless.
This is a companion discussion topic for the original entry at https://linuxconfig.org/filtering-packets-in-wireshark-on-kali-linux