Advanced aesthetics covers the injectable treatments: relaxing a muscle so a line stops deepening, replacing volume that has been lost, and rebalancing proportions across the face. The distinction that matters is between anti-wrinkle treatment, which softens movement, and filler, which restores structure. Most faces that look tired need the second more than the first, and the consultation exists to work out which. Everything here is done by a qualified, insured practitioner and nothing is sold on the day you ask about it.
Injectables get treated as one thing and they are really two. Anti-wrinkle treatments relax a specific muscle so the skin above it stops folding, which works on lines caused by movement. Fillers add volume back to a compartment that has emptied, which works on hollowing, flattening and loss of definition. They solve different problems and the wrong one produces a result that looks off without anybody being able to say why.
The other thing worth knowing before you book is that the place you notice a problem is often not the place to treat. A jowl is rarely fixed by filling the jowl, and a hollow under the eye is usually the cheek having dropped away beneath it. Reading the whole face is the difference between work that looks like nothing was done and work that everybody spots.