Check your code. It's basically all about your app, database queries and how quickly you can send response for a request.
If you can't improve optimizing your app and database, you can always upgrade to a better hardware, but from my perspective, there is always room to improve the app. It's cheaper, makes more sense, specially long term and you should focus on that.
Pro tip: do not spam the board with your website links.
I have started the off-page activities for my website, but there's a constant question in my mind, that should i still do directory submission or not? Some sites say it is beneficial and others say it is not. What to do?
I have started working on a website:
I am hoping to drive traffic from various platforms, being an accounting website can I have some suggestion where do I start my off-page SEO from?