What is a one-sentence summary of the following article?
. One of the most common reasons for wanting to contact Google or Gmail is to reset a forgotten password for a Gmail account. You can reset your account password from the desktop site. If you know your password and you just want to change it, you can do so from both the desktop site and the mobile app. . If you're unfamiliar with Gmail, particularly if the new Gmail format is confusing you, reviewing Gmail's proper use may help solve your problem. . You can prevent unwanted emails from senders by blocking their email addresses. . If you're receiving unwanted emails from services or subscriptions, you can mark them as spam to indicate to Gmail that future matching emails should be sent to the Spam folder. . You can add contacts to your Gmail account by using the Contacts app from within the Gmail inbox. . If you're looking for an email you accidentally deleted within the last 30 days, you can retrieve it from the Trash. You might also want to check the archived email folder by clicking All Mail on the left side of the Gmail inbox, though you may first need to click More and scroll down on this section. If your Gmail mobile app isn't up to date, you may run into problems with anything from email synchronization to logging in. You can update it by doing the following depending on your smartphone:   iPhone — Open the {"smallUrl":"https:\/\/www.wikihow.com\/images\/5\/55\/Iphoneappstoreicon.png","bigUrl":"\/images\/thumb\/5\/55\/Iphoneappstoreicon.png\/30px-Iphoneappstoreicon.png","smallWidth":460,"smallHeight":460,"bigWidth":"30","bigHeight":"30","licensing":"<div class=\"mw-parser-output\"><p>I edited this screenshot of an iOS icon.\n<\/p><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"http:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a><br>\n<\/p><\/div>"} App Store, tap Updates, and tap UPDATE to the right of the Gmail app icon if it's there.  Android — Open the {"smallUrl":"https:\/\/www.wikihow.com\/images\/1\/1e\/Androidgoogleplay.png","bigUrl":"\/images\/thumb\/1\/1e\/Androidgoogleplay.png\/26px-Androidgoogleplay.png","smallWidth":460,"smallHeight":531,"bigWidth":"26","bigHeight":"30","licensing":"<div class=\"mw-parser-output\"><p>I edited this screenshot of an Android icon\n<\/p><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"http:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a><br>\n<\/p><\/div>"} Play Store, tap ☰, tap My apps & games, and tap UPDATE to the right of the Gmail app icon if it's there.

Summary:
Change or reset your Gmail password Brush up on Gmail basics Block emails from unwanted senders Mark unwanted emails as spam Add contacts to your account Restore deleted emails Update the Gmail app if necessary.