This idea just occurred to me a few minutes ago.

Alternatively: "I just had this idea a few minutes ago."

We canould have a word cloud at the lower part of the left sidebar on the user's profile page.

"We can have..." to me implies that this is something that we can currently do. A feature which is already added.

"We could have..." is more about a possibility that could be a feature. One which hasn't actually been done.

How does it comewill it form?--

Or, alternatively: "Where will it come from?"

I think I prefer "form" here, though it's hard for me to describe why. I think "come" implies something already built and made, simply moving from one spot to another. But a word cloud, like you're talking about, doesn't work that way. Rather, it gradually builds up in size, but stays in the same place.

Also, you'll notice me changing things to future tense. For theoretical possibilities, I would avoid present tense and instead either use future tense or imperfect past tense. Present tense indicates that this is the reality now, which isn't true in this case.

What is itwill it be used for?--

1) Showing the user's real level and style to the correctors;.

If the idea works, I attribute it to the strawberry I just ate, which was grown by myself.

Although I've been changing some of the tenses, this conditional statement works best in present tense.

I might say "me" instead of "myself" in this sentence ("by me" vs. "all by myself"), but otherwise this sentence is perfectly fine!