Running ads on one platform is straightforward once you learn its interface. The harder question for most marketers is which platforms to add next, and how each one actually differs — not just in interface, but in what kind of campaign it's genuinely good for. Here's a practical rundown of the five platforms most marketers end up considering.
Meta (Facebook & Instagram)
Meta remains the default starting point for most advertisers because of its audience scale and mature targeting and optimization tools. It's strong for both direct-response e-commerce campaigns and broader brand awareness, with ad formats spanning single image, carousel, video, and Stories/Reels placements. The learning curve is moderate — Meta's algorithm does a lot of optimization work automatically once given enough conversion data, but that also means giving it time (the learning phase) before judging early performance too harshly.
Best for: e-commerce, app installs, lead generation, broad consumer audiences.
Google (Search, Display & YouTube)
Google Ads covers intent-based search advertising, display banner ads across the web, and YouTube video ads — three quite different formats under one platform. Search ads capture demand that already exists (someone actively searching for a product category), which typically makes them a strong performer for bottom-funnel conversion, while Display and YouTube are better suited to building awareness with audiences that haven't already expressed intent.
Best for: capturing existing search demand (Search), broad reach and video storytelling (YouTube/Display).
TikTok
TikTok ads perform best when they don't look like ads — native-feeling, vertical video with on-screen text and a hook in the first two seconds consistently outperforms repurposed content from other platforms. The audience skews younger than Meta on average, though this has broadened significantly. TikTok rewards creative volume and testing more than most platforms, because trends and formats shift quickly.
Best for: brands with a strong video/UGC creative pipeline, younger or trend-responsive audiences.
LinkedIn is the clear choice for B2B advertising specifically because of its professional targeting data — job title, company size, industry, seniority — that no consumer platform can match. It's meaningfully more expensive per click or lead than Meta or TikTok, which makes it a poor fit for low-price-point consumer products but a strong fit for B2B lead generation where a single converted lead can be worth a large multiple of the ad spend.
Best for: B2B lead generation, recruiting, high-value B2B products and services.
Reddit ads reach highly engaged, topic-specific communities (subreddits), which makes it valuable for niche products where a passionate, relevant community exists — gaming, tech, finance, hobbyist categories in particular. Reddit's culture is skeptical of anything that reads as a traditional ad, so creative that acknowledges the platform's tone directly tends to outperform polished, corporate-style content.
Best for: niche/community-driven products, tech and gaming audiences, authentic/conversational creative.
How to choose where to start
Don't add a platform because a competitor is on it — add it because your actual customer profile matches what that platform's audience and format are good at. A B2B SaaS company evaluating TikTok should ask honestly whether its buyer is actually reachable there, versus assuming that "more platforms" automatically means more growth. Start with the one or two platforms that most directly match your existing customer profile, prove out a repeatable process there, and only then expand — trying to launch all five at once as a beginner usually means doing all five poorly rather than two well.
What changes once you're running more than one
The moment a second platform enters the mix, the operational questions become just as important as the platform-specific knowledge above: how do you keep creative on-brand across formats, how do you compare performance across platforms that report metrics differently, and how do you avoid the manual overhead of managing multiple ad managers separately. That's the point where most teams start looking at consolidated tools rather than continuing to run each platform as its own silo.