Ranking Droping

A site audit is a good option to start. If you find the source of the problem you maybe resolve it. In case not getting back the rankings, you have to make some improvements. Build some links or check out Magicserp, their solution is pretty cool too.

Site audit and check spammy links. Make sure your content quality is unique, interesting according to the user needs and keep on updating it regularly.

You can simply use an google news old edition approved site to rank instantly on any keywords.