A texture pack was a collection of files that were used to change the in-game textures of blocks, items, mobs and the GUI. The native resolution of Minecraft's textures were 16×16 (measured pixels in block height and width). 32×32, 64×64, 128×128, 256×256, 512×512, and 1024×1024 textures were referred to as "HD". In Java Edition 1.6.1, texture packs were replaced with resource packs, which provide more control over textures and other game features, such as music and text.
How to install a Resource Pack?
Step 1 - Download a Resource Pack for free from BuddiesKraft Official Website.
Step 2 - Press Windows + R in your keyboard.
Step 3 - Write %appdata% in this opened dialog box and press Enter.
Step 4 - Open .minecraft > resourcepacks folder and place the downloaded file here.
Step 5 - Open the game and go to Options > Resource Packs.
Step 6 - Move the resource pack you want to use from left to right using arrow buttons on it.
Step 7 - Now press done, open any world in game and Resource Pack will start working.