just (do something)

You use this phrase when the action you're describing seems easy, simple, fast, unimportant, or unexciting:

I just googled "new york florist" and that was the first shop that came up, so I called them.

A: What did you do this weekend?

B: I just sat at home and watched T.V.

google (something)

Google is the most popular Internet search engine. In casual English, people often use "google" as a verb. It means to search for information in a search engine:

A: Where is it?

B: I don't know. Just google it.

A more formal way to say this is "do an Internet search for ___":

Often the best way to learn how to accomplish a task is not to ask an expert, but simply to do an Internet search for the information.

a florist

A "florist" is a person or shop that sells flowers:

I stopped by a florist and got her a bouquet of flowers.

(something) comes up

When you're searching for something on a computer, you can say that the search results "come up":

I tried searching for it, but nothing useful came up.

If you search for my name, my website is the first result that comes up.

You can think about this phrase as meaning that the results come up on your screen.

Note that there's also a completely different meaning of the phrase "come up".