Williams contributed 22 goals, the best return of his career, as the Robins finished fourth in League One before beating Sheffield United to reach the play-off final.
Ahead of that clash with Preston at Wembley on Sunday, the forward has emphasised how significant a win under the famous arch would be, given the drastic budget cuts which have taken place at the County Ground over the past 18 months and the relative inexperience of the club’s young squad.
When asked what promotion would mean to the club, Williams said: “It would be a massive achievement. A lot has been made of what we’ve achieved so far this season but, for me, this is a group that deserves to get promotion.
“We’ve got an unbelievable group of young, talented players here and I’d be disappointed if at least half of them didn’t go on to play in the Premier League in their careers.
“I’ve been so impressed with them this year and I think it’s only right we finish it where we deserve to be, which is in the Championship next season.
“A lot of credit has to go to the recruitment policy here; the way they have assembled the squad here this season has been fantastic.
“We were worried in pre-season about what was going to happen to us and it wasn’t a positive pre-season by any stretch of the imagination but once we began to bring these players in I was very confident.
“I know a lot has been made of the various things – the budget isn’t what it was when I first came – but we’ve got a lot of very talented players possibly being underpaid, which is why we’ve achieved so much this season.”