From Deck Advice to a Deck You Can Send
You have a deck, but it reads like your internal story, not something an investor will skim and remember. You do not need more generic advice; you need to fix this deck, for this raise.

The same question, answered two ways
Ask generic AI, then ask with the capsule loaded.
“What is the most important thing a founder should focus on when building a pitch deck to win investor interest?”
Generic AI
The most important thing is to make investors quickly believe this can become a large, high-return business. Lead with the problem, the size of the opportunity, and why now.
With the capsule
The real focus is investor-specific relevance: build the deck from the investor's point of view, not from your company's internal story. A deck tailored to what a given fund already believes and backs beats a polished-but-generic one, which is why the same slides can win one meeting and lose another.

After you decide, it stays with you and builds what you need.
How Capxule helps here
It remembers your pick
Commit to an approach and every answer after anchors to it, instead of restarting each time.
It builds the deliverable
The plan, the checklist, or the draft, filled in for your actual situation, not a blank template.
Right in your docs
Take it into your Google Suite or Microsoft Suite and keep working, with the capsule alongside you.
What you walk away with
You send a deck built for the reader, not your org chart.
Try it on your own question.