Why use I-beam?

Could you please elaborate on the advantages of utilizing I-beams in construction projects? I understand they're popular due to their unique shape, but I'm curious about the specific benefits they offer over other types of beams. Are they stronger, more cost-effective, or easier to install? And how do their design features contribute to these advantages? I'd appreciate a detailed explanation of the reasons why I-beams are often the preferred choice for many construction professionals.