Conventions of campaigns

Campaigns have conventions which are in every part of that company/groups campaign.This usually includes:
Logo
Slogan
Contact details
Colour scheme

A perfect example of a campaign which holds alot of the normal conventions is the smoke free campaign. They have a website and lots of posters and ads and a very large campaign including tv ads.
At the moment there holding stoptober, which has a website tv ads and lots more.
https://stoptober.smokefree.nhs.uk/
They follow the conventions because they all have the same logo, they all have the NHS logo on them somewhere in the poster or video, they all have the slogan STOPtober on them and they all have smokefree with there logo on them somewhere.
The contact details are always there and the link to there site is always there aswell.
The colour scheme of the ads are all the same with a big red circle around the stop, with a bluey greeny background.

The conventions are there to help you remember or think when you see them, its to keep you thinking about the campaign.