Preparing the Google Adwords certification
1- Search Fundamentals Review, how to organize campaigns and Ads in your accounts. Next picture could give you an idea to help you to understand best that,

Adword recommend to organize your account as well is structured your website. For example you could create campaign for each section and Ad group for each category on your website.

1.1 Adwords account limits.
Check the Adwords account limits, you can create at least 10 000 Campaigns, 20 000 Ad group and 20 000 Ad group targeting per ad group.
1.2 Ad limits
You can create at leat 300 image/gallery ads, 50 text non-image/gallery ads per ads ad group and 4 million active or paused ad per account.

2  Adwords keyword matching options

Adwords has three different match types Broad match(By default, is good to maximize your potential to show your Ads on relevant searches.).  Broad match modifier  your ad could show for a close variations, but no synonyms in any order( its symbol is +keyword), Phrase match you ad could show for a phrase and close variations of that phrase(is symbol is “keyword” example “Cambridge Students say”), Exact match are an exact term and close variations of that exact term(symbol [keyword] example [camssay]) and negative match are searches without the term(symbol is -keyword)

3 Your Ad position and ad Rank

The ad position is the order Adwords could show your ad on the search page is determined by your ad rank auction(Every single search Adwords does in auction to determine the ad position).  The ad rank is the score that Adwords gives to your ad is determined by you bid, the component of Quality score, and the expected impact of extensions and other ad formats.
Your Quality score is determined by expected clicktrough rate(clicks divided by numbers of impressions), landing page experience( relevant and original content, easy to navigate and transparent), and ad relevance.
“Note that if you’re using extensions such as sitelinks, the expected impact from those extensions is factored into your Ad Rank. This means that if two competing ads have the same bid and quality, the ad with the better expected impact from extensions will generally appear in a higher position than the other.”

Your  actual Cost Per Click:
Your actual CPC if the final amount that you’re charged for a click!

4- Ad formats
4.1 Text Ad
The standard type of AdWords ad. A text ad includes a link to your website and a description or promotion of your product or service.
Is a headline, a display URL, and two description lines.
“Adwords recommends this tips to create a successful text ad, Highlight what makes you unique,Include prices, promotions, and exclusives, empower customers to take action, include at least one of your keywords, match your ad to your landing page, appeal to customers on mobile, do experiment,  and check for common ad text mistakes.”

4.2 Products listing ads
Allow you include an image, title, price, promotional message, and your store or business name.

The products listing ads use your existing Merchant Center product feed and not keyword to decide how and where to show your ads. Google will be charge for clicks using the CPC basis

4.3 Dynamic search ads
Don’t use keywords. Instead, automatically show your ad based on the content of your website.
Recommended for:
For business with websites that contain a lot of content or well-structured url, your website feature different products of services or you sell seasonal product lines or other offerings, or you’re expanding your business to new market will the best results from using Dynamics Search Ads(DSA).
Not recommend for:
If your websites that feature daily deals, nowadays(11-07-2015) DSA is not a good idea as Ad format.

Benefits of DSA,Dynamics Search Ads:
Save time, frequent and automatic updates to your ads, show relevant dynamic-generated headlines with your ads, control your campaign and capture additional traffic.

5-Ad extensions
Show extra information about your business like your address, phone number with your Ad text. On mobile phone they includes a link directions to your business.
The cost to add Ad extension is free, you will charge only if someone click on that extension(You actual CPC)

You clicktrough rate can boost 10% with ad location extension!

6- Adwords tools
Keep in mind
IP exclusions are not available for the following campaign types:
“Search Network with Display Select – Standard”
“Search Network only – Standard”
“Display Network only – Standard”
“Display Network only – Ads in mobile apps”

6.1 Adwords API
The developer token is a unique combination of letters, numbers, and characters that identifies your AdWords API activity. It’s the key to talking to the AdWords server and your clients’ AdWords accounts.

7.Optimizing Performance
The opportunities tab is as a personal assistant who customizes opportunities for your account. It can help you discover new keywords, improve your bids and budgets, and etc.
That tab opportunities need to you have enough historic data to be able to work with it. It can help you to:

• See performance estimates based on historical data
• Make improvements without spending a lot of time
• Keep your campaigns fresh

7.1 Campaigns experiments

The campaign experiments allow to test for example adding new keywords, raising a bid, trying new ads, or using different placements. Campaign Experiments influence your Quality Score for any keywords involved in your experiments. No cost to use the campaign experiments but if you increase your bid as part of you experiments, you will pay that amount(Your actual CPC will increase).
The most common experiment according Google are Increasing conversions and clicks or impressions, also
Improving return on investment, campaign quality or ad text.