I need advice about gift cards

Hello everyone! I'm reaching out to seek some guidance in my current situation. It's a common dilemma for me, as I often struggle with deciding what gifts to give to my friends or acquaintances on their birthdays. Recently, I've come across something called gift cards! I would greatly appreciate it if you could share your knowledge on this topic and also let me know about any services that offer gift and discount cards that you might be aware of. Your insights and recommendations would be highly valuable to me.