I need someones expertise advice on a SEO problem!

• I have a landing page that I want to rank well for PowerPoint Templates and has in the past. The page will show up around the 15 position, and then in a day or two plummet 80 positions. Then in about 5 -6 days, it will show back up around the 15 position. I can see small fluctuations being normal, but this see abnormal.

• Anyone ever experience this or have an idea what may be the cause?

Any help would be greatly appreciated.

Thanks,

Judd