What are the advantages and disadvantages of online marketing communications?

Advantages:
Targeting Capability – Advertiser reaches individuals based on browsing behaviour and preferences.
Broad and Flexible Reach – The online audience continues to grow in size; since ads can be bought by the impression, you can buy as much or as little of the audience as you desire.
Timing – Messages can be delivered 24 hours a day, 7 days a week.
Interactivity – Messages encourage consumer to interact with brands while online (performing a task, playing a game, and so on).
Tracking and Measurement – Detailed information about who saw an ad, in what context, and how many times is available immediately.

Disadvantages:
Low Click Rates – Average click rates of only 1% are common, which significantly reduces the number of visitors to a website (the intended action).
Advertising Overload – Too much advertising clutter on a webpage reduces the potential impact of any ad appearing on the page.
Consumer Frustration – The barrage of unexpected banner ads frustrates consumer; advertisers must deal with their wrath.
Too Measurable – A marketer can be overburdened with the amount of data available from an online advertising campaign.

Thanks for the response