As said earlier, SEO is the way to drive, monitor, and analyze organic traffic to your website, and it takes time to show results.
PPC or Pay Per Click is a way to digitally run a paid promotion on SERPs where you get to pay only when a user clicks on your ad.
On the other hand, SMM stands for Social Media Marketing and is a marketing policy in which brands promote their products or services among their audience on various social platforms such as Facebook, Instagram, Linkedin, or others.