What is static ram and dynamic ram?

Both are types of volatile memory, meaning they forget everything when the power goes out.

Static RAM, or SRAM, is like a sprinter. It's incredibly fast because it uses a complex circuit to hold each bit of data. It doesn't need to be refreshed. This makes it expensive and bulky. You'll find SRAM used for your CPU's cache, where every nanosecond counts.

Dynamic RAM, or DRAM, is the marathon runner. This is your main system memory. It stores data in tiny capacitors that leak charge, so it must be constantly refreshed. This design is slower, but much cheaper and denser than SRAM.