93% of online experiences begin with a google search - you need to show up when they come looking for you. Youtube, Google Shopping and google Search advertising all live in the google ads account. You can't afford not to optimize yours because whether you need web or foot traffic, google is the ultimate referrer.
LinkedIN is where all of the professionals live. This makes it the ideal billboard for b2b services and products. Build brand awareness and reach decision makers with ease. Linkedin is extremely effective when leveraged correctly.