c++ - More about EOF in loop condition

Okay, when I saw this thread: Why is iostream::eof inside a loop condition (i.e. `while (!stream.eof())`) considered wrong?

I read the answers but I really didn't understand what is wrong in this, maybe because I don't have much experience in c++ but my code works exactly the way it's supposed to.

int main()
{
    ifstream file;
    string text, search;
    int offset;

    cout << "Enter a word: "; cin >> search;
    file.open("Find.txt");
    if (file.is_open()) {
        while (!file.eof()) {
            file >> text;
            offset = text.find(search, 0);
            if (offset != string::npos) {
                cout << text << endl;
            }
        }

    }
    else {
        cout << "Error!";
        return 0;
    }
    file.close();
}

I enter in a word, and it searches for it in a text file, and I had zero problems using that. So, when is this condition considered wrong?