<s>
Google	B-Protocol
Optimize	I-Protocol
,	O
(	O
GO	O
)	O
formerly	O
called	O
Google	B-Protocol
Website	I-Protocol
Optimizer	I-Protocol
,	O
is	O
a	O
freemium	O
web	O
analytics	O
and	O
testing	B-Application
tool	O
by	O
Google	B-Application
.	I-Application
</s>
<s>
The	B-Application
Google	I-Application
Optimize	O
website	O
is	O
used	O
to	O
design	O
experiments	O
and	O
open	O
a	O
WYSIWYG	B-Application
editor	I-Application
for	O
each	O
version	O
tested	O
in	O
the	O
experiment	O
.	O
</s>
<s>
The	O
free	O
version	O
allows	O
running	O
a	O
few	O
experiments	O
at	O
the	O
same	O
time	O
and	O
a	O
user	O
needs	O
to	O
upgrade	O
to	O
Google	B-Protocol
Optimize	I-Protocol
360	O
to	O
run	O
more	O
of	O
them	O
.	O
</s>
<s>
The	B-Application
Google	I-Application
Optimize	O
editor	O
is	O
a	O
Chrome	O
extension	O
that	O
allows	O
changing	O
some	O
aspects	O
of	O
visible	O
HTML	B-Language
elements	O
.	O
</s>
<s>
Changes	O
are	O
then	O
applied	O
with	O
JavaScript	B-Language
tailored	O
by	O
rules	O
set	O
in	O
an	O
experiment	O
.	O
</s>
<s>
You	O
can	O
also	O
modify	O
HTML	B-Language
inside	O
chosen	O
elements	O
which	O
allows	O
adding	O
more	O
advanced	O
changes	O
.	O
</s>
<s>
GO	O
allows	O
running	O
some	O
A/B	O
tests	O
—	O
or	O
test	O
multiple	O
combinations	O
of	O
page	O
elements	O
such	O
as	O
headings	O
,	O
images	O
,	O
or	O
body	O
copy	O
;	O
known	O
as	O
multivariate	O
testing	B-Application
.	O
</s>
<s>
Other	O
tests	O
include	O
A/B/n	O
testing	B-Application
where	O
"	O
n	O
"	O
refers	O
to	O
an	O
unknown	O
number	O
of	O
variations	O
a	O
user	O
will	O
test	O
.	O
</s>
<s>
Split	O
URL	O
testing	B-Application
or	O
redirect	O
testing	B-Application
can	O
be	O
used	O
to	O
check	O
how	O
individual	O
pages	O
are	O
working	O
against	O
each	O
other	O
.	O
</s>
<s>
Server-Side	B-Application
testing	B-Application
can	O
be	O
used	O
to	O
view	O
reports	O
and	O
results	O
.	O
</s>
<s>
It	O
could	O
be	O
used	O
at	O
multiple	O
stages	O
in	O
the	O
conversion	B-Protocol
funnel	I-Protocol
.	O
</s>
<s>
The	O
editor	O
alone	O
will	O
not	O
work	O
for	O
creating	O
complicated	O
tests	O
especially	O
on	O
pages	O
with	O
dynamic	O
content	O
such	O
as	O
Angular	B-Language
,	O
Vue	B-Language
or	O
React	B-Application
.	O
</s>
<s>
To	O
use	O
GO	O
on	O
more	O
complicated	O
,	O
dynamic	O
pages	O
,	O
manual	O
work	O
by	O
programmers	B-Application
is	O
required	O
to	O
integrate	O
experiments	O
into	O
frontend	B-Architecture
or	I-Architecture
backend	I-Architecture
code	O
.	O
</s>
<s>
On	O
1	O
June	O
2012	O
,	O
Google	B-Application
announced	O
that	O
Google	B-Protocol
Website	I-Protocol
Optimizer	I-Protocol
(	O
the	O
predecessor	O
to	O
Google	B-Protocol
Optimize	I-Protocol
)	O
as	O
a	O
separate	O
product	O
would	O
be	O
retired	O
as	O
of	O
1	O
August	O
2012	O
,	O
and	O
its	O
functionality	O
would	O
be	O
integrated	O
into	O
Google	B-Application
Analytics	I-Application
as	O
Google	B-Application
Analytics	I-Application
Content	O
Experiments	O
.	O
</s>
<s>
However	O
,	O
Google	B-Application
revived	O
Google	B-Protocol
Website	I-Protocol
Optimizer	I-Protocol
as	O
Google	B-Protocol
Optimize	I-Protocol
,	O
which	O
allows	O
connecting	O
to	O
Google	B-Application
Analytics	I-Application
to	O
run	O
the	O
tests	O
and	O
design	O
experiments	O
on	O
the	O
GO	O
website	O
.	O
</s>
<s>
Google	B-Protocol
Optimize	I-Protocol
and	O
Optimize	O
360	O
was	O
announced	O
to	O
be	O
sunset	O
and	O
no	O
longer	O
available	O
after	O
September	O
30	O
,	O
2023	O
.	O
</s>
<s>
Google	B-Protocol
Optimize	I-Protocol
is	O
part	O
of	O
the	B-Application
Google	I-Application
Marketing	O
Platform	O
.	O
</s>
