Well basically i changed an already existing page thats the home page but its been a week and google has not updated it in the search results .. i have changed the title and meta description for that how much time does it take normally ??
Depends on how frequently google crawls your page. If it doesn't crawl very often it can take awhile. You could try to get a few backlinks to the page and hope google will come and crawl it sooner and update. If google has or is crawling it regularly I've seen 1 week or less to update changes. Just depends.
It depends on the Google crawling rate on your website. If you have any blog within your website, then update the blog. This will help in fast crawling of your website.
It's depend on google bots revisiting process. You should make backlink for google bots which is revisit your site. Google bots takes some time for it so have patience for it.
share the link with social media sites submit with the RSS directories Do blog comment Attach forum signatures you will find the site indexed faster