evar expiration and duplicate visits

[andrese57731295]

Hi Guys

I want to make sure if I understand how evars work

Lets say tha twe have 3 evars configured for paid campaings for email campaigns  and for Afiliates the paid campaing (SEM) has an expiration of 15 days, email evar has an expiration of 7 days, affiliate (aff) has an expiration of 1 day, inthe next example:

day	Traffic Variable	visits
1	SEM	1
2	Aff	1
3	Email	1

How many visits are going to report for each Traffic variable, when checking the 3 days in total? is this true -- SEM 3 visits (since the cookie persist for 15 days), Aff 1 visit, Email 1 visitis

Thanks for your help

[Asheesh_Pandey · Accepted solution]

Let's assume same visitor visits site from sem channel on day 1, affiliate channel on day 2 and from email channel on day 3.

Assumption: we set different eVars (based on channel type) on each campaign visit.   Reporting window : Last 3 days.

e.g.

Evar	expiration	allocation	eVar value set/overwrite	eVar value set/overwrite	eVar value set/overwrite	Visit	Visitor
			day 1	day 2	day 3
sem	15 days	last touch	sem visit	sem visit (value persist)	sem visit (value persist)	3	1
aff	1 days	last touch	not set	aff visit	null (previous value expired)	1	1
email	7 days	last touch	null	null	email visit	1	1

Note: There is another eVar setting which can impact over user visit attribution to channel i.e. allocation its value can be first touch, last touch, linear etc. but in your case as you set different eVar based on channel visits (in place of setting all channel value in one eVar) and in this example same visitor is coming from different channel, it will not overwrite previous channel value till it self expire.

Thanks!

Asheesh