These alerts use a four-tier system, so not every notification means the same level of danger - they range from "green" (low risk) all the way up to "red" (exceptional risk). The fact that you got one means conditions warrant attention, but understanding which tier your area actually sits in makes a real difference to how you should adjust your plans.
Beyond checking the official risk level, here's something most people skip: look at your specific postcode on the met office or local fire service interactive map rather than just trusting the blanket alert. Risk can genuinely differ between neighboring towns depending on fuel (dry vegetation), terrain, and how close you are to open land. If you're in a moderate zone in an urban area with mostly gardens and streets, your day-to-day caution needs are different from someone in a rural spot surrounded by woodland or moorland. The alert gets sent wide to cast a wide net, but your actual precautions should match what's actually around you.
That said, it's worth respecting the warning. If you were planning anything with naked flames - garden fires, campfires, even leaving a barbecue unattended - now's genuinely the time to skip it. Keep gutters clear of debris (dry leaves catch embers fast), don't leave hoses coiled where they can't reach, and make sure your garden sheds or outbuildings aren't packed against long grass. It's not panic-worthy if you're informed, but it is worth taking seriously.