<s>
Job	B-Application
ads	I-Application
aggregator	I-Application
-	O
also	O
known	O
as	O
search	O
engine	O
for	O
job	O
ads	O
-	O
is	O
a	O
website	O
that	O
aggregates	B-Application
job	O
ads	O
from	O
various	O
job	O
boards	O
,	O
multiposter	O
sites	O
,	O
as	O
well	O
as	O
from	O
direct	O
employers	O
and	O
employment	O
agencies	O
.	O
</s>
<s>
Job	O
aggregation	O
market	O
was	O
pioneered	O
by	O
Indeed	O
which	O
remains	O
the	O
biggest	O
job	B-Application
ads	I-Application
aggregator	I-Application
today	O
as	O
per	O
Similar	O
Web	O
rankings	O
.	O
</s>
