A tablet is a touchscreen computer, typically with no external devices like keyboard or mouse. (Those could be added via Bluetooth if desired, in most cases.)
iPad is Apple's tablet product.
I have an iPad 2 about 7+ years old. Miss Kitty bought it to stay current with technology, since she was a media specialist/librarian. She played with it for a month, before she got them at work, then gave it to me. Only problem is the stupid thing is so old it won't run the latest opsys and hence the latest apps. I can't run MeWe nor will upgrade the browsers. I do run FB, IG, eMail and Kindle reader on it. Maybe next year I'll upgrade and just use the old iPad as a security camera monitor.