If you are looking at this one then its on the main street down to the beach, surrounded by B&Bs double yellows both sides and next to no parking.
You should also know that if you buy on the island of Great Yarmouth, South Town, or Cobholm then you are at risk of flooding. Even though the beach seems large and the sea far away when we have very high Tides those areas can be flooded.
Tourist season, getting in and out of Yarmouth takes a VERY long time, a journey that takes me less than 10 minutes out of season often takes more than an hour.
Shopping, the main shopping area in Gt Yarmouth town is largely just pounds hops and looking very derelict. Most locals will shop at Gapton Hall for Tkmaxx, Next, Etc, there are all of your main supermarkets though Asda, Sainsburys, Tesco, Iceland, Farm foods in or close to GY, Gorleston has a Morrisons.
If you can move further out towards Gorleston then that would be better even if you needed to get a small mortgage, it's nicer, less touristy, more green spaces for children.
Public transport, the public transport is good, buses run regularly it just takes a while to get anywhere. Yarmouth has a train station that connects to Norwich that then links to National routes, Yarmouth is also served by National express.
Crime, Yarmouth has a big drugs problem and county lines problem and there are lots of homeless in and around the main town. Crime is largely domestic there have been a couple of stabbings recently but they are between groups of people known to each other. If you aren't involved in those things then the worse things that seem to happen are bike thefts.
My parents moved from London when I was a preteen, we live just outside of Great Yarmouth. I have never felt particularly unsafe walking around and the crime is nothing compared to where we used to live. Big crimes hit the newspapers when they happen as they are a rare occurance. I'm glad my parents decided to move here. Summers were spent on the beach. As a teen/student I never struggled for work, working on the seafront in the March-Oct allowing me to focus on my studies the rest of the year and I always had a job when I came back from uni each summer.