The laptop screen or desktop monitor is commonly referred to as its display. The display's resolution is a measurement of how sharp, or realistic, your computer's images are. It refers to the number of pixels – tiny points of color – viewable on the rectangular screen, horizontally and vertically. The higher a display's resolution, the sharper and more realistic its images are.

Memory or Random Access Memory (RAM) allows your computer to multitask. It temporarily stores data and the higher number of GB (Gigabytes) means more applications can be running in tandem without slowdowns. Some intensive applications for gaming or video editing, require more RAM for optimal performance.
Memory described as 'DDR' stands for 'Double Data Rate' and processes data approximately twice as fast as a standard memory module. When a number appears after DDR (ie DDR3) that type of memory is approximately twice as fast as the previous generation.

The hard drive is where a computer stores all files, pictures, music, and programs. Different from memory which is temporary when in use, storage determines how much data can be saved on the computer. Measured in  Gigabytes (GB) and Terabytes (TB). Terabytes are 1,000 gigabytes.
There are HDD (hard disk) and SSD (solid state) drives. SSDs are faster and use less energy, while HDDs have the ability to store more data and are typically larger in size.

The graphics card (or video card or GPU) displays everything you see and are an essential piece of hardware. It determines the range of color, how sharp images appear, and how well videos or games run without stuttering or pausing. Integrated graphics are built-in to your PC's processor, while dedicated or discrete graphics are separate from the processor and enable you to run smoothly more advanced programs although they typically use more power.