Russian Internet Trolls
What They Are.
Trolls are programmers that make ads or games of some sort to influence people on the social media.
They are usually hired by pepole so that they may either better the chances of winning something. Such as
a voting or to promote their company or downgrade others. They are very crafty and wiwll use a lot of means to get
to you. Such as memes like this one of Hillary 
They would do something like this to make you view someone more negative than you would most likely wouldn't have.
How They Affect Society
Just as I said before there affect on society is to persuade people to view someone or something in
a different way. They will change the flow of things of the way stuff runs so you run into
what they want you to see. They will pay money to use ads to put stuff up to get to you. They can always get to you
but there are ways to defend against them.
How to Defend Against Them
There are several ways to defend against trolls. One common way would be to download an ad blocker to block out
their content. Another way is to not care when you see it and jus continue on. Those are a few wasy and common methods,
of course there are other methods that could work like just not using social media in general, or researching more
advance methods which you can use but thats up to you.