A Power of Attorney is a legal document where one person (the donor) gives others (their attorneys) the right to act on their behalf.
This can be a temporary convenience (Ordinary Power of Attorney) but, for longer-term arrangements, most people use an Enduring Power of Attorney (EPA) or Lasting Power of Attorney (LPA).
There are a number of reasons why you might need someone to make decisions for you or act on your behalf.
It could just be temporary: for example, if you are in hospital and need help with everyday things such as making sure that bills are paid.
Or you may need to make more long-term plans if, for example, you have been diagnosed with dementia.