Any idea what that herbal shop smell usually is?

There probably isn’t one standard smell. Incense is a likely part of it, and blends with notes like patchouli, sandalwood, or frankincense can come across as warm and herbal. If you remember whether it smelled smoky or more like perfume, that could narrow it down.

Ask the shop what they burn or diffuse. That’s the easiest way to identify the particular scent, and you can check whether they sell it as incense, oil, or soap. Similar shops can smell quite different.

It might be a mix of things rather than a single herb: incense, scented products, and dried plants can all contribute. For a soap, try comparing descriptions for patchouli or sandalwood first, but the exact blend is hard to guess from the general smell alone.