The phrase "and it is useful" is correct and usable in written English.
You can use it to emphasize the practicality or benefit of something previously mentioned in a sentence.
Example: "This tool simplifies the process, and it is useful for both beginners and experts."
Alternatives: "and it is beneficial" or "and it proves helpful."
Its application is exemplified in the Shenguang III Facility (SG-III) that verifies its effectiveness and it is useful for guiding the design of hohlraum structure parameter.
However, there are other simpler methods which can be used to prepare graphene, and it is useful to study their performance.
It can be used to perform differential expression analysis and it is useful to assign gene expression changes to specific cell-types.
Moreover, it can be performed more than once, its cost is limited, and it is useful during the follow-up of patients who have undergone surgery and patients treated with medical therapy.
Drugs such as amodiaquine or lumefantrine are used as the long-lasting component in ACTs, and it is useful to have the capacity to detect their absence from such formulations.
The coefficient of variation (CV) is commonly used as a measure of precision and it is useful to compare results with theoretical expectations as these expectations hold for equilibrium.
There are moments when you use a consumer app, such as a calendar, and it is useful but not critical.
Then, the initial condition of Logistic map can be estimated using Equation 2. SDM has low computational complexity and it is useful for general chaotic map.
Keeping relations civil between neighbours is the best start and it is useful to be furnished with the facts.
And it is useful to think of "Workspheres" as an architecture and urbanism show as well as a design show.
That would surely be desirable, and it is useful for journalists to try to hold politicians accountable for their lies.
