clicks dropping all of a sudden

Hi,

My adgroup was doing fine, getting around 1.5K clicks daily.
One fine
day, the clicks dropped to around 500s (down by almost 1k
clicks!!) and
has never recovered since, consistently garnering only
300-400 clicks
per day for the next 5-6 days. The impressions also went
down, but only
by around 20%. During this time period, my CTR went down
from 0.3% to
0.1%. As far as I know, the only changes I made during those
days were
marginally reducing CPCs for a few keywords.

Anyone knows why this is happening, please reply to this
thread.

Any help is appreciated.

btw, the campaign had both search and content search
activated.

Thanks,
Arun

Dear Arun

I am interested to more know a bout ppc program could you
please tell
me the best site i can park my domain cause i have 1000
domain just
idle now.

thank before