Understand the choice
Freshly roasted coffee releases gas, and a coffee may brew differently as it rests. There is no single rest period that fits every roast, packaging format and brewing method. An espresso recipe can be more sensitive to changing gas release than an immersion brew.
Put it into practice
Keep beans sealed, cool and dry, away from strong smells. Record the opening date and use the roast-date tool to compare sessions without claiming a universal expiry date.
Keep the conversation useful
Share your actual recipe or experience, identify the coffee or equipment and explain what changed. A clear question with measurements makes the discussion easier for others to answer.