What are the three main factors that determine ad quality? a. Expected clickthrough rate, ad formats, and ad relevanceb. Expected clickthrough rate, landing page experience, and ad relevancec. Expected clickthrough rate, max CPC bid, and landing page experience d. Max CPC bid, landing page experience, and ad relevance

B. Expected clickthrough rate, landing page experience, and ad relevance.

Explanation:

Here’s an example of a good user experience based on an ad that is high quality and relevant. Let's say that you own a website that specializes in socks, and Sam, a customer, is looking for striped socks. Here’s how your ad (and high Quality Score keywords) connects Sam with what he wants.

When Sam searches Google for “men’s striped socks,” he sees your ad. (Your ad has “[striped socks]” as a keyword.)

Sam clicks the ad and lands right on your website’s “striped men’s socks” page. The page loads quickly and is easy for Sam to use.

Sam buys several pairs of striped socks.

That's what we consider a great user experience. Beyond a potentially higher Quality Score in most cases, relevant ads tend to earn more clicks, appear in a higher position, and bring you the most success

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.