user1136: I refer to this question by a new user to Biology-SE site.  It was closed as being "unclear what you're asking".
It seems to me, whatever else, it is very clear what is being asked: What do the terms 'good cholesterol' and 'bad cholesterol' refer to?.
For example, the Mayo clinic has this to say about 'good' and 'bad' cholesterol:

Low-density lipoprotein (LDL). LDL, or "bad," cholesterol transports cholesterol particles throughout your body. LDL cholesterol builds up in the walls of your arteries, making them hard and narrow.
High-density lipoprotein (HDL). HDL, or "good," cholesterol picks up excess cholesterol and takes it back to your liver.

Other examples of the use of these terms may be found at the following sites: HDL (Good), LDL (Bad) Cholesterol and Triglycerides (The American Heart Foundation), LDL and HDL Cholesterol: "Bad" and "Good" Cholesterol and Is there really such a thing as ‘good’ and ‘bad’ cholesterol?
What is the justification for closing this question?  It is surely the type of question that this site should be trying to attract?
Secondly, why be so unwelcoming to a new user?  One of the comments is 'You can't get cholesterol from vegetables', which is at best misleading (vegetables do contain cholesterol, just not very much, and plant membranes contain cholesterol), but (IMO) is also unnecessarily hostile.
One of the most popular stackoverflow questions is How to exit the Vim Editor, making up around .005% of question traffic (see here for a commentary).  It has been viewed over 1.4 million times. The answer is freely available elsewhere (:help quit, from within Vim, for example), but is would seem that programmers use Google whenever they have a difficulty, and SO is the 'go-to' place. It seems to me that Biology-SE has a lot to learn in this regard.
It is surely reasonable that the OP be given a reasonable hearing, that the question be interpreted in the spirit it was asked, and that the SO community provide answers in a welcoming and friendly manner?
Finally, let's consider things from the viewpoint of a new visitor who uses Google to search for 'good and bad cholesterol' and compares the quality of  Biology SE to that of (say) the American Heart Foundation.  In this instance at least, we are not the 'go-to' place.

user9943: I cannot speak for the close-voters, but I support their choice.

What is the justification for closing this question? 

The question is underresearched (homework), as it contains two lines: a header and an identical question body. 
The question is, as a consequence of above, too broad, as it leaves the question open What is bad, what is good?
The question is, as a consequence, primarily opinion based, as OP needs to define good and bad. 
So I disagree with 

It is surely the type of question that this site should be trying to attract?

As it is a prime example of a question we don't want to attract here. Lastly, question views are, imo, not a proxy for question quality. For instance, the bot decides whether a question makes it into the hot list, primarily based on the post's activity in the first hour, quite irrespective of its premise.

1136: <p>I refer to <a href="https://biology.stackexchange.com/q/71883/1136">this question</a> by a new user to Biology-SE site.  It was closed as being &quot;unclear what you're asking&quot;.</p>
<p>It seems to me, whatever else, it is <em>very clear</em> what is being asked: <em>What do the terms 'good cholesterol' and 'bad cholesterol' refer to?</em>.</p>
<p>For example, the <a href="https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/symptoms-causes/syc-20350800" rel="nofollow noreferrer">Mayo clinic</a> has this to say about 'good' and 'bad' cholesterol:</p>
<blockquote>
<p>Low-density lipoprotein (LDL). LDL, or &quot;bad,&quot; cholesterol transports cholesterol particles throughout your body. LDL cholesterol builds up in the walls of your arteries, making them hard and narrow.</p>
<p>High-density lipoprotein (HDL). HDL, or &quot;good,&quot; cholesterol picks up excess cholesterol and takes it back to your liver.</p>
</blockquote>
<p>Other examples of the use of these terms may be found at the following sites: <a href="http://www.heart.org/HEARTORG/Conditions/Cholesterol/HDLLDLTriglycerides/HDL-Good-LDL-Bad-Cholesterol-and-Triglycerides_UCM_305561_Article.jsp#.WstJZZch200" rel="nofollow noreferrer">HDL (Good), LDL (Bad) Cholesterol and Triglycerides</a> (The American Heart Foundation), <a href="https://www.cdc.gov/cholesterol/ldl_hdl.htm" rel="nofollow noreferrer">LDL and HDL Cholesterol: &quot;Bad&quot; and &quot;Good&quot; Cholesterol</a> and <a href="https://www.irishtimes.com/life-and-style/health-family/is-there-really-such-a-thing-as-good-and-bad-cholesterol-1.3265539" rel="nofollow noreferrer">Is there really such a thing as ‘good’ and ‘bad’ cholesterol?</a></p>
<p><strong>What is the justification for closing this question?  It is surely the type of question that this site should be trying to attract?</strong></p>
<p>Secondly, why be so unwelcoming to a new user?  One of the comments is 'You can't get cholesterol from vegetables', which is at best misleading (vegetables do contain cholesterol, just not very much, and plant membranes contain cholesterol), but (IMO) is also unnecessarily hostile.</p>
<p>One of the most popular stackoverflow questions is <a href="https://stackoverflow.com/questions/11828270/how-to-exit-the-vim-editor">How to exit the Vim Editor</a>, making up around .005% of question traffic (see <a href="https://stackoverflow.blog/2017/05/23/stack-overflow-helping-one-million-developers-exit-vim/">here</a> for a commentary).  It has been viewed over 1.4 million times. The answer is freely available elsewhere (:help quit, from within Vim, for example), but is would seem that programmers use Google whenever they have a difficulty, and SO is the 'go-to' place. It seems to me that Biology-SE has a lot to learn in this regard.</p>
<p>It is surely reasonable that the OP be given a reasonable hearing, that the question be interpreted in the spirit it was asked, and that the SO community provide answers in a welcoming and friendly manner?</p>
<p>Finally, let's consider things from the viewpoint of a new visitor who uses Google to search for 'good and bad cholesterol' and compares the quality of  Biology SE to that of (say) the <a href="http://www.heart.org/HEARTORG/Conditions/Cholesterol/HDLLDLTriglycerides/HDL-Good-LDL-Bad-Cholesterol-and-Triglycerides_UCM_305561_Article.jsp#.WstJZZch200" rel="nofollow noreferrer">American Heart Foundation</a>.  In this instance at least, we are not the 'go-to' place.</p>
 9943: <p>I cannot speak for the close-voters, but I support their choice.</p>

<blockquote>
  <p>What is the justification for closing this question? </p>
</blockquote>

<p>The question is underresearched (<strong>homework</strong>), as it contains two lines: a header and an identical question body. </p>

<p>The question is, as a consequence of above, <strong>too broad</strong>, as it leaves the question open <em>What is bad, what is good</em>?</p>

<p>The question is, as a consequence, <strong>primarily opinion based</strong>, as OP needs to define <em>good</em> and <em>bad</em>. </p>

<p>So I disagree with </p>

<blockquote>
  <p>It is surely the type of question that this site should be trying to attract?</p>
</blockquote>

<p>As it is a prime example of a question we <em>don't</em> want to attract here. Lastly, question views are, imo, not a proxy for question quality. For instance, the bot decides whether a question makes it into the hot list, primarily based on the post's activity in the first hour, quite irrespective of its premise.</p>
