Optifine adds supports for HD textures, Dynamic Lights, Shaders and much more. A complete tool for your gameplay, with Optifine, you more than Double your FPS.
Optifine is one of the most updated tools in the Minecraft community, available since version 1.0 and is in the development of version 1.19.
Open the downloaded JAR file, click "Install", and OptiFine will be installed in the official Minecraft launcher with its profile "OptiFine".