Who are house rules directed at?

The two houses of Congress - the House of Representatives, and the Senate - each have their own sets of rules defining how members (over 400 in the house, exactly 100 in the senate) interact, debate, communicate, speak their ideas, vote, and otherwise do their jobs while in session. The rules for each house allow both houses of congress to do what they've been hired to do - make good laws, make bad laws better, and make needed laws quickly without sacrificing quality. When Congress is operating efficiently, both of the other branches of government are able to operate more efficiently to better serve the people they're been chosen to govern.