No, not always. Some indicators are better suited for certain ranges; UI will provide a rough indication across a huge range, but other indicators can be more accurate across a small range, and this is when they are used.
Because it can identify the basicity or the acidity of the whole pH scale. This includes right from 0-6, acidic, 7, neutral, and 8-14, basic. This is colour coded, using warm colours, red, orange and...
A universal indicator shows both sides of the pH scale whereas other indicators such as phenolphthalein shows alkalis as pink but neutral and acids as clear
Universal indicator clearly distinguishes between a strong and weak acid/base, while litmus indicator doesn't. they both identify whether a substance is acidic or basic