Both of these spend a marketing budget to win attention, and they are often set against each other as if you had to pick a side. You do not. Digital advertising and experiential marketing are good at almost opposite things. One buys reach: it puts a message in front of a lot of people, cheaply and measurably. The other buys depth: it gets fewer people to actually feel something and remember it. The useful question is not which is better, but which job you are trying to do.
What digital advertising does best
Digital advertising is the paid message: search, social, display, video, the ads that follow you around the web. Its strengths are real and hard to match anywhere else. It reaches enormous audiences at a low cost per person, it targets with a precision no physical event can (by interest, location, behaviour, lookalike), and it is measurable almost to the click, so you can see what a campaign returned and adjust it in hours. If you need to be known by a lot of people quickly, or drive traffic to a specific page, this is usually the most efficient tool there is. Its limit is that it is an interruption. It arrives while someone is doing something else, it competes with everything else in the feed, and it is easy to scroll past, skip or block. An impression is attention rented for a second, not a relationship, and most of the audience is on a platform you do not own and cannot take with you.
What experiential marketing does best
Experiential marketing is the opposite trade. Instead of sending a message to a screen, you give people something to take part in: a live activation, an installation, a hands-on demo, an event built around doing rather than watching. Its strength is depth. Taking part is multi-sensory and active, so it lands as a memory rather than a glance, and people who were genuinely part of something tend to talk about it, which turns a single moment into earned reach you could not buy. Because the interaction is real, it is also the natural place to capture an opt-in and first-party data the customer hands over willingly, and to give them a reason to come back. The honest cost is that it does not scale like an ad. It reaches fewer people, it costs more per person, it takes more to design and run, and it is harder to measure, because what it produces (recall, feeling, word of mouth) is slower to show up in a dashboard than a click-through rate.
When each one fits
The goal is scale, precise targeting or measurable traffic, and you need it soon. Nothing turns budget into broad, trackable reach as efficiently.
The goal is a deep first interaction that people remember and talk about, and where you can start a real relationship rather than a single view.
Advertising drives reach to an experience worth having, and the experience gives the advertising something real to point people toward.
The honest difference
The cleanest way to hold the two apart: digital advertising is measured by how many people you reach, and experiential marketing is measured by how deeply the people you reach are affected. Reach without depth is a lot of glances that fade by the next scroll. Depth without reach is a wonderful experience almost nobody knew about. Most strong programs use both, and in a deliberate order: advertising to bring people to the door, and something worth taking part in once they are inside. The mistake is asking an ad to build a relationship it was never designed to build, or running a beautiful experience that no one outside the room ever hears about.
The reason experiential is worth the extra effort is what it can become. A one-off event is just a spectacle, but an experience built as participation, with an opt-in, clean first-party data and a reason to return, is where a single moment turns into a repeatable relationship. The reach gets people there; the participation is what keeps them. Loyalty is the outcome of that, not of the impression that first caught their eye. More on the moment itself in what is a brand activation? and on the wider idea in participation marketing.