An administrator takes over the legal responsibility for running the company from the directors. The administrator is a court-appointed official and has to act in the best interests of the company's creditors. That can, and often does, mean selling the company either as a going concern, or as a 'pre-pack', which often means the sale of the company to the original owners free of some, or all, of its debt, which has to be written off by its creditors. A pre-pack can be viewed as a way out for the original owners to the detriment of the company's unsecured creditors (which may indeed be the case) but it is often the only way for the company to be saved, albeit as a different legal entity. Alternatively, the administrator may decide that the best result for the creditors would be the piecemeal sale of the company's assets, and when there's nothing left to sell then the company is placed in liquidation and wound up. If the assets are long term (e.g. a bank would have long term loans), an administrator may decide to continue running the company on reduced overheads whilst those assets are realised.
The outcome all depends on the type of business it is, whether it has any realisable assets and how happy the creditors are to wait if needs be. The administrator is personally liable to the court, so his/her choice of action to put to the creditors is not a responsibility taken lightly.
Unfortunately, in the majority of cases, administration is a step towards liquidation. Your friend should ask the administrators to keep the staff fully informed, not because they can influence the process (unless they are creditors), but because clear communication can help prevent misunderstanding which can then descend into unpleasantness all round. Administration is a difficult time for employees (I have been in that situation) and ultimately it will probably (but not definitely) mean eventual redundancy.