When you are plans are definite, use GOING TO. When you dream of doing something, use WILL. When you're talking about actions that are far into the future (months or maybe years from now), use WILL. When you're talking about actions that you will do soon (tomorrow or next week), use GOING TO.

Will going to meaning?

Going to is used with predictions. When you are making a decision use will; use going to after the decision has been made. We sometimes also use the present continuous for planned events in the near future. When we want to talk about future facts or things we believe to be true about the future, we use will.

Will going to sentences?

For plans or decisions made before speaking. Is John coming home soon? – Yes, I'm going to meet him at the airport tomorrow. I'm going to watch TV in a minute, because my favourite programme is on.