It is essential to download a single mod at one time that could efficiently deal with all the enhancements in your games, as too many mods may slow down the speed of your desktop.
KSP mods come with a lot of its version, but the best Kerbal Engineer Redux mod enhances your game features a lot.
These are the following steps which are used to install a KSP mod;
1. As soon as you find the mod you need, download it, which will come in the zip folder.
2. Find the KSP mod folder on your PC.
3. As soon as you find the KSP mod folder, open the game data.
4. Drag the mod file to the game data folder.
5. That is all, as next time you open a kerbal space program, your mod will open through it,