This article is about PPC ("pay-per-click") advertising which is different than "organic" search - I'll cover organic search and SEO in another article.
The biggest difference between running Facebook Ads and running Google "Adwords" Ads is how people are finding you.
For Google's "search network" which is what you are used to seeing when you type things into Google, you are finding people by what they type into Google - these words that they type are called "keywords" - and you set your ad to appear when users type certain keywords. Are you a plumber in New Jersey? Well, you can have your ad appear when people in New Jersey type "plumber New Jersey". Are you an Acro-Yoga (acrobatic yoga) teacher who leads retreats in Bali? Well when people type "acro-yoga retreats bali" you can have your ad appear. When they click on the ad, they would come to your website on a special page about your next Bali Acro-Yoga retreat. Got it?
Facebook Ads are more about a person's demographics or psychographics rather than what they are searching for on Google. Let's use the example of you being an Acro-yoga teacher who leads retreats in Bali. You can have your ad appear only on the Facebook page of women 30-55 who "like" acro-yoga.
There are a lot of other differences between Facebook and Google Ads but the ones listed above are the primary difference. Which should you use? Well, it depends on who your customers are, who else is competing for them (this drives up your cost per click) on each channel and your personal preferences. Experiment with both of them and see which one you like and if you need any help we have online courses which you can watch on-demand in the comfort of your home 24/7 on both Google Adwords and Facebook Ads.