CPU

The brain of the computer. It is the thing that controls what hardware needs to to what task and determines overall response, quickness and capabilities

Model

2 of the main producers AMD and Intel will have a specific naming convention to quickly identify the capabilities of their CPU. Some goals may be budget-oriented, gaming, servers, enterprise or home use. Intel: AMD:

Pin Layout or Form Factor

Cores

How many 'hands' or tasks can be handled at once. Most computers now days come with 4 or 8 but you can get away with 4 for basic home use.

Processors

How many fingers per hand. Allows for more complex tasks to be handled by the same core before needing to outsource parts of the process to other cores.

Threads

How many individual things need to happen in order to complete a task.

GHz

How much electrical power goes into making the CPU work. The higher the Ghz, the faster the hands can potentially move. This is the thing people talk about increasing when they 'overclock' = give cpu more power than it was built for so it can be faster at processing tasks. 1.5 Ghz is weenie mode computers when 4 Ghz is good for quick daily stuff and moderate gaming but 6 is just overkill (for like servers and ai training and big complex stuff)

GPU(s)

Graphics Processing Unit = It acts as a mini-CPU that refers specifically the visual stuff on the computer. It's the thing that renders games, youtube, anything you see on the monitor outside of direct code. It has the physical GPU chip and VRAM (Video RAM) and serve the same roles when it concerns only visuals. Almost all motherboards will have an "onboard" GPU that is soldered down. The onboard GPU is weak compared to a dedicated Graphics Card and should not be used for intense computations like AI modeling or gaming but for basic computer navigation in files or apps.

Cooling

Monitor

doesn't really matter as long as she's not gonna be gaming. Don't worry about getting a curved monitor (when looking dead on vs looking at the screen from the side, they appear similar) or anti-blue light since (alleged eye fatigue) the effects are minimal for just home browsing or easy use

Pixels

How high Def u want to get, 1920x1080 is enough but u can got like 4k and 8k for way more money.

Hertz

The refresh rate. Higher hertz allows for computers pushing faster frame rates to actually keep up with those frame rates. If the computer updates a picture 60 fps but the monitor can only update 30 hertz, the final picture is going to be at 30 hertz.