AIDA – Attention, Interest, Desire, Action

AJAX – Asynchronous Javascript and XML

API – Application program interface

AOV – Average order value

AR – Augmented reality

ASP – Application service provider

ATD – Agency trading desk

B2B – Business to business

B2C – Business to consumer

CLV – Customer lifetime value

CMS – Content management system

CPA – Cost per acquisition / action

CPC – Cost per click

CPL – Cost per lead

CPM – Cost per thousand

CPV – Cost per view (see also PPV)

CR – Conversion rate

CRM – Customer relationship management

CRO – Conversion rate optimisation

CSS – Cascading style sheets

CTA – Call to action

CTR – Click-through rate

CX – Customer experience

DM – Direct mail (or ‘Direct message’, in Twitter circles)

DMP – Data management platform

DNS – Domain name system

DR – Direct response

DSP – Demand-side platform

ECPM – Effective CPM

EPC – Earnings per click

EPM – Earnings per thousand

ESP – Email service provider

FB – Facebook

FBML – Facebook Markup Language

FTP – File transfer protocol

GA – Google Analytics

HIPPO – Highest paid person’s opinion

HTML – HyperText Markup Language

HTTP – Hyper Text Transfer Protocol

HTTPS – Hyper Text Transfer Protocol Secure

IM – Instant Messaging

IMAP – Internet Message Access Protocol

IP – Intellectual property (or ‘Internet Protocol’)

IPTV – Internet protocol television

ISP – Internet service provider

KPI – Key performance indicator

LTV – Lifetime value

MoM – Month on month

MLM – Multi-level marketing

MVT – Multivariate testing

OEM – Original equipment manufacturer

OS – Operating system (sometimes this is used for ‘open source’)

PHP – PHP Hypertext Preprocessor

POS – Point of sale

PPC – Pay per click

PPL – Pay per lead

PPV – Pay per view

PR – PageRank

PV – Pageviews

QA – Quality assurance

QR Code – Quick response code

QS – Quality score

RFI – Request for information

RFP – Request for proposal

ROI – Return on investment

RON – Run of network

ROR – Ruby on Rails

ROS – Run of site

RSS – Really Simple Syndication

RT – Retweet

RTB – Real time bidding

RTD – Real time data

S2S – Server to server

SaaS – Software as a service

SEM – Search engine marketing

SEO – Search engine optimisation

SERP – Search engine results page

SLA – Service level agreement

SM – Social media

SME – Small / medium enterprise. (aka SMB = ‘business’)

SMM – Social media marketing

SMO – Social media optimisation

SMP – Social media platform

SMS – Short message service

SOV – Share of voice

SOW – Statement of work

SSL – Secure Sockets Layer

SSP – Supply-side platform

SWOT – Strengths, weaknesses, opportunities, threats

TLD – Top level domain

TOS – Terms of service

UCD – User-centric design

UI – User interface

UGC – User-generated content

URL – Uniform resource locator

USP – Unique selling proposition

UV – Unique visitor

UX – User experience

VOD – Video on demand

VM – Viral marketing

WOMM – Word of mouth marketing

WYSIWYG – What you see is what you get

YOY – Year on year

YTD – Year to date

XML – Extensible Markup Language

What others are there that are worth knowing / used often?

SMDH, P&G: Why brands need to stop trying to be ‘young’ and ‘internet’